zeusdeux · October 21, 2025 11:20
diff --git a/main.go b/main.go
 // Authors: http://github.com/ctbur and http://github.com/zeusdeux
 // Copyright 2025-forever
 // Do whatever you want with the source. Make sure to attribute http://github.com/ctbur and http://github.com/zeusdeux
 // THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 package main

 import (
 	"bufio"
 	"flag"
 	"fmt"
 	"log"
 	"math/rand"
 	"os"
 	"runtime"
 	"runtime/pprof"
 	"strconv"
 	"time"
 )

 type WeatherStation struct {
 	id              string
 	meanTemperature float64
 }

 func (r *WeatherStation) measurement() float64 {
 	m := rand.NormFloat64()*10 + r.meanTemperature
 	return m
 }

 const MEASUREMENT_FILE = "./measurements-go.txt"

 var stations = []WeatherStation{
 	WeatherStation{"Abha", 18.0},
 	WeatherStation{"Abidjan", 26.0},
 	WeatherStation{"Abéché", 29.4},
 	WeatherStation{"Accra", 26.4},
 	WeatherStation{"Addis Ababa", 16.0},
 	WeatherStation{"Adelaide", 17.3},
 	WeatherStation{"Aden", 29.1},
 	WeatherStation{"Ahvaz", 25.4},
 	WeatherStation{"Albuquerque", 14.0},
 	WeatherStation{"Alexandra", 11.0},
 	WeatherStation{"Alexandria", 20.0},
 	WeatherStation{"Algiers", 18.2},
 	WeatherStation{"Alice Springs", 21.0},
 	WeatherStation{"Almaty", 10.0},
 	WeatherStation{"Amsterdam", 10.2},
 	WeatherStation{"Anadyr", -6.9},
 	WeatherStation{"Anchorage", 2.8},
 	WeatherStation{"Andorra la Vella", 9.8},
 	WeatherStation{"Ankara", 12.0},
 	WeatherStation{"Antananarivo", 17.9},
 	WeatherStation{"Antsiranana", 25.2},
 	WeatherStation{"Arkhangelsk", 1.3},
 	WeatherStation{"Ashgabat", 17.1},
 	WeatherStation{"Asmara", 15.6},
 	WeatherStation{"Assab", 30.5},
 	WeatherStation{"Astana", 3.5},
 	WeatherStation{"Athens", 19.2},
 	WeatherStation{"Atlanta", 17.0},
 	WeatherStation{"Auckland", 15.2},
 	WeatherStation{"Austin", 20.7},
 	WeatherStation{"Baghdad", 22.77},
 	WeatherStation{"Baguio", 19.5},
 	WeatherStation{"Baku", 15.1},
 	WeatherStation{"Baltimore", 13.1},
 	WeatherStation{"Bamako", 27.8},
 	WeatherStation{"Bangkok", 28.6},
 	WeatherStation{"Bangui", 26.0},
 	WeatherStation{"Banjul", 26.0},
 	WeatherStation{"Barcelona", 18.2},
 	WeatherStation{"Bata", 25.1},
 	WeatherStation{"Batumi", 14.0},
 	WeatherStation{"Beijing", 12.9},
 	WeatherStation{"Beirut", 20.9},
 	WeatherStation{"Belgrade", 12.5},
 	WeatherStation{"Belize City", 26.7},
 	WeatherStation{"Benghazi", 19.9},
 	WeatherStation{"Bergen", 7.7},
 	WeatherStation{"Berlin", 10.3},
 	WeatherStation{"Bilbao", 14.7},
 	WeatherStation{"Birao", 26.5},
 	WeatherStation{"Bishkek", 11.3},
 	WeatherStation{"Bissau", 27.0},
 	WeatherStation{"Blantyre", 22.2},
 	WeatherStation{"Bloemfontein", 15.6},
 	WeatherStation{"Boise", 11.4},
 	WeatherStation{"Bordeaux", 14.2},
 	WeatherStation{"Bosaso", 30.0},
 	WeatherStation{"Boston", 10.9},
 	WeatherStation{"Bouaké", 26.0},
 	WeatherStation{"Bratislava", 10.5},
 	WeatherStation{"Brazzaville", 25.0},
 	WeatherStation{"Bridgetown", 27.0},
 	WeatherStation{"Brisbane", 21.4},
 	WeatherStation{"Brussels", 10.5},
 	WeatherStation{"Bucharest", 10.8},
 	WeatherStation{"Budapest", 11.3},
 	WeatherStation{"Bujumbura", 23.8},
 	WeatherStation{"Bulawayo", 18.9},
 	WeatherStation{"Burnie", 13.1},
 	WeatherStation{"Busan", 15.0},
 	WeatherStation{"Cabo San Lucas", 23.9},
 	WeatherStation{"Cairns", 25.0},
 	WeatherStation{"Cairo", 21.4},
 	WeatherStation{"Calgary", 4.4},
 	WeatherStation{"Canberra", 13.1},
 	WeatherStation{"Cape Town", 16.2},
 	WeatherStation{"Changsha", 17.4},
 	WeatherStation{"Charlotte", 16.1},
 	WeatherStation{"Chiang Mai", 25.8},
 	WeatherStation{"Chicago", 9.8},
 	WeatherStation{"Chihuahua", 18.6},
 	WeatherStation{"Chișinău", 10.2},
 	WeatherStation{"Chittagong", 25.9},
 	WeatherStation{"Chongqing", 18.6},
 	WeatherStation{"Christchurch", 12.2},
 	WeatherStation{"City of San Marino", 11.8},
 	WeatherStation{"Colombo", 27.4},
 	WeatherStation{"Columbus", 11.7},
 	WeatherStation{"Conakry", 26.4},
 	WeatherStation{"Copenhagen", 9.1},
 	WeatherStation{"Cotonou", 27.2},
 	WeatherStation{"Cracow", 9.3},
 	WeatherStation{"Da Lat", 17.9},
 	WeatherStation{"Da Nang", 25.8},
 	WeatherStation{"Dakar", 24.0},
 	WeatherStation{"Dallas", 19.0},
 	WeatherStation{"Damascus", 17.0},
 	WeatherStation{"Dampier", 26.4},
 	WeatherStation{"Dar es Salaam", 25.8},
 	WeatherStation{"Darwin", 27.6},
 	WeatherStation{"Denpasar", 23.7},
 	WeatherStation{"Denver", 10.4},
 	WeatherStation{"Detroit", 10.0},
 	WeatherStation{"Dhaka", 25.9},
 	WeatherStation{"Dikson", -11.1},
 	WeatherStation{"Dili", 26.6},
 	WeatherStation{"Djibouti", 29.9},
 	WeatherStation{"Dodoma", 22.7},
 	WeatherStation{"Dolisie", 24.0},
 	WeatherStation{"Douala", 26.7},
 	WeatherStation{"Dubai", 26.9},
 	WeatherStation{"Dublin", 9.8},
 	WeatherStation{"Dunedin", 11.1},
 	WeatherStation{"Durban", 20.6},
 	WeatherStation{"Dushanbe", 14.7},
 	WeatherStation{"Edinburgh", 9.3},
 	WeatherStation{"Edmonton", 4.2},
 	WeatherStation{"El Paso", 18.1},
 	WeatherStation{"Entebbe", 21.0},
 	WeatherStation{"Erbil", 19.5},
 	WeatherStation{"Erzurum", 5.1},
 	WeatherStation{"Fairbanks", -2.3},
 	WeatherStation{"Fianarantsoa", 17.9},
 	WeatherStation{"Flores,  Petén", 26.4},
 	WeatherStation{"Frankfurt", 10.6},
 	WeatherStation{"Fresno", 17.9},
 	WeatherStation{"Fukuoka", 17.0},
 	WeatherStation{"Gabès", 19.5},
 	WeatherStation{"Gaborone", 21.0},
 	WeatherStation{"Gagnoa", 26.0},
 	WeatherStation{"Gangtok", 15.2},
 	WeatherStation{"Garissa", 29.3},
 	WeatherStation{"Garoua", 28.3},
 	WeatherStation{"George Town", 27.9},
 	WeatherStation{"Ghanzi", 21.4},
 	WeatherStation{"Gjoa Haven", -14.4},
 	WeatherStation{"Guadalajara", 20.9},
 	WeatherStation{"Guangzhou", 22.4},
 	WeatherStation{"Guatemala City", 20.4},
 	WeatherStation{"Halifax", 7.5},
 	WeatherStation{"Hamburg", 9.7},
 	WeatherStation{"Hamilton", 13.8},
 	WeatherStation{"Hanga Roa", 20.5},
 	WeatherStation{"Hanoi", 23.6},
 	WeatherStation{"Harare", 18.4},
 	WeatherStation{"Harbin", 5.0},
 	WeatherStation{"Hargeisa", 21.7},
 	WeatherStation{"Hat Yai", 27.0},
 	WeatherStation{"Havana", 25.2},
 	WeatherStation{"Helsinki", 5.9},
 	WeatherStation{"Heraklion", 18.9},
 	WeatherStation{"Hiroshima", 16.3},
 	WeatherStation{"Ho Chi Minh City", 27.4},
 	WeatherStation{"Hobart", 12.7},
 	WeatherStation{"Hong Kong", 23.3},
 	WeatherStation{"Honiara", 26.5},
 	WeatherStation{"Honolulu", 25.4},
 	WeatherStation{"Houston", 20.8},
 	WeatherStation{"Ifrane", 11.4},
 	WeatherStation{"Indianapolis", 11.8},
 	WeatherStation{"Iqaluit", -9.3},
 	WeatherStation{"Irkutsk", 1.0},
 	WeatherStation{"Istanbul", 13.9},
 	WeatherStation{"İzmir", 17.9},
 	WeatherStation{"Jacksonville", 20.3},
 	WeatherStation{"Jakarta", 26.7},
 	WeatherStation{"Jayapura", 27.0},
 	WeatherStation{"Jerusalem", 18.3},
 	WeatherStation{"Johannesburg", 15.5},
 	WeatherStation{"Jos", 22.8},
 	WeatherStation{"Juba", 27.8},
 	WeatherStation{"Kabul", 12.1},
 	WeatherStation{"Kampala", 20.0},
 	WeatherStation{"Kandi", 27.7},
 	WeatherStation{"Kankan", 26.5},
 	WeatherStation{"Kano", 26.4},
 	WeatherStation{"Kansas City", 12.5},
 	WeatherStation{"Karachi", 26.0},
 	WeatherStation{"Karonga", 24.4},
 	WeatherStation{"Kathmandu", 18.3},
 	WeatherStation{"Khartoum", 29.9},
 	WeatherStation{"Kingston", 27.4},
 	WeatherStation{"Kinshasa", 25.3},
 	WeatherStation{"Kolkata", 26.7},
 	WeatherStation{"Kuala Lumpur", 27.3},
 	WeatherStation{"Kumasi", 26.0},
 	WeatherStation{"Kunming", 15.7},
 	WeatherStation{"Kuopio", 3.4},
 	WeatherStation{"Kuwait City", 25.7},
 	WeatherStation{"Kyiv", 8.4},
 	WeatherStation{"Kyoto", 15.8},
 	WeatherStation{"La Ceiba", 26.2},
 	WeatherStation{"La Paz", 23.7},
 	WeatherStation{"Lagos", 26.8},
 	WeatherStation{"Lahore", 24.3},
 	WeatherStation{"Lake Havasu City", 23.7},
 	WeatherStation{"Lake Tekapo", 8.7},
 	WeatherStation{"Las Palmas de Gran Canaria", 21.2},
 	WeatherStation{"Las Vegas", 20.3},
 	WeatherStation{"Launceston", 13.1},
 	WeatherStation{"Lhasa", 7.6},
 	WeatherStation{"Libreville", 25.9},
 	WeatherStation{"Lisbon", 17.5},
 	WeatherStation{"Livingstone", 21.8},
 	WeatherStation{"Ljubljana", 10.9},
 	WeatherStation{"Lodwar", 29.3},
 	WeatherStation{"Lomé", 26.9},
 	WeatherStation{"London", 11.3},
 	WeatherStation{"Los Angeles", 18.6},
 	WeatherStation{"Louisville", 13.9},
 	WeatherStation{"Luanda", 25.8},
 	WeatherStation{"Lubumbashi", 20.8},
 	WeatherStation{"Lusaka", 19.9},
 	WeatherStation{"Luxembourg City", 9.3},
 	WeatherStation{"Lviv", 7.8},
 	WeatherStation{"Lyon", 12.5},
 	WeatherStation{"Madrid", 15.0},
 	WeatherStation{"Mahajanga", 26.3},
 	WeatherStation{"Makassar", 26.7},
 	WeatherStation{"Makurdi", 26.0},
 	WeatherStation{"Malabo", 26.3},
 	WeatherStation{"Malé", 28.0},
 	WeatherStation{"Managua", 27.3},
 	WeatherStation{"Manama", 26.5},
 	WeatherStation{"Mandalay", 28.0},
 	WeatherStation{"Mango", 28.1},
 	WeatherStation{"Manila", 28.4},
 	WeatherStation{"Maputo", 22.8},
 	WeatherStation{"Marrakesh", 19.6},
 	WeatherStation{"Marseille", 15.8},
 	WeatherStation{"Maun", 22.4},
 	WeatherStation{"Medan", 26.5},
 	WeatherStation{"Mek'ele", 22.7},
 	WeatherStation{"Melbourne", 15.1},
 	WeatherStation{"Memphis", 17.2},
 	WeatherStation{"Mexicali", 23.1},
 	WeatherStation{"Mexico City", 17.5},
 	WeatherStation{"Miami", 24.9},
 	WeatherStation{"Milan", 13.0},
 	WeatherStation{"Milwaukee", 8.9},
 	WeatherStation{"Minneapolis", 7.8},
 	WeatherStation{"Minsk", 6.7},
 	WeatherStation{"Mogadishu", 27.1},
 	WeatherStation{"Mombasa", 26.3},
 	WeatherStation{"Monaco", 16.4},
 	WeatherStation{"Moncton", 6.1},
 	WeatherStation{"Monterrey", 22.3},
 	WeatherStation{"Montreal", 6.8},
 	WeatherStation{"Moscow", 5.8},
 	WeatherStation{"Mumbai", 27.1},
 	WeatherStation{"Murmansk", 0.6},
 	WeatherStation{"Muscat", 28.0},
 	WeatherStation{"Mzuzu", 17.7},
 	WeatherStation{"N'Djamena", 28.3},
 	WeatherStation{"Naha", 23.1},
 	WeatherStation{"Nairobi", 17.8},
 	WeatherStation{"Nakhon Ratchasima", 27.3},
 	WeatherStation{"Napier", 14.6},
 	WeatherStation{"Napoli", 15.9},
 	WeatherStation{"Nashville", 15.4},
 	WeatherStation{"Nassau", 24.6},
 	WeatherStation{"Ndola", 20.3},
 	WeatherStation{"New Delhi", 25.0},
 	WeatherStation{"New Orleans", 20.7},
 	WeatherStation{"New York City", 12.9},
 	WeatherStation{"Ngaoundéré", 22.0},
 	WeatherStation{"Niamey", 29.3},
 	WeatherStation{"Nicosia", 19.7},
 	WeatherStation{"Niigata", 13.9},
 	WeatherStation{"Nouadhibou", 21.3},
 	WeatherStation{"Nouakchott", 25.7},
 	WeatherStation{"Novosibirsk", 1.7},
 	WeatherStation{"Nuuk", -1.4},
 	WeatherStation{"Odesa", 10.7},
 	WeatherStation{"Odienné", 26.0},
 	WeatherStation{"Oklahoma City", 15.9},
 	WeatherStation{"Omaha", 10.6},
 	WeatherStation{"Oranjestad", 28.1},
 	WeatherStation{"Oslo", 5.7},
 	WeatherStation{"Ottawa", 6.6},
 	WeatherStation{"Ouagadougou", 28.3},
 	WeatherStation{"Ouahigouya", 28.6},
 	WeatherStation{"Ouarzazate", 18.9},
 	WeatherStation{"Oulu", 2.7},
 	WeatherStation{"Palembang", 27.3},
 	WeatherStation{"Palermo", 18.5},
 	WeatherStation{"Palm Springs", 24.5},
 	WeatherStation{"Palmerston North", 13.2},
 	WeatherStation{"Panama City", 28.0},
 	WeatherStation{"Parakou", 26.8},
 	WeatherStation{"Paris", 12.3},
 	WeatherStation{"Perth", 18.7},
 	WeatherStation{"Petropavlovsk-Kamchatsky", 1.9},
 	WeatherStation{"Philadelphia", 13.2},
 	WeatherStation{"Phnom Penh", 28.3},
 	WeatherStation{"Phoenix", 23.9},
 	WeatherStation{"Pittsburgh", 10.8},
 	WeatherStation{"Podgorica", 15.3},
 	WeatherStation{"Pointe-Noire", 26.1},
 	WeatherStation{"Pontianak", 27.7},
 	WeatherStation{"Port Moresby", 26.9},
 	WeatherStation{"Port Sudan", 28.4},
 	WeatherStation{"Port Vila", 24.3},
 	WeatherStation{"Port-Gentil", 26.0},
 	WeatherStation{"Portland (OR}", 12.4},
 	WeatherStation{"Porto", 15.7},
 	WeatherStation{"Prague", 8.4},
 	WeatherStation{"Praia", 24.4},
 	WeatherStation{"Pretoria", 18.2},
 	WeatherStation{"Pyongyang", 10.8},
 	WeatherStation{"Rabat", 17.2},
 	WeatherStation{"Rangpur", 24.4},
 	WeatherStation{"Reggane", 28.3},
 	WeatherStation{"Reykjavík", 4.3},
 	WeatherStation{"Riga", 6.2},
 	WeatherStation{"Riyadh", 26.0},
 	WeatherStation{"Rome", 15.2},
 	WeatherStation{"Roseau", 26.2},
 	WeatherStation{"Rostov-on-Don", 9.9},
 	WeatherStation{"Sacramento", 16.3},
 	WeatherStation{"Saint Petersburg", 5.8},
 	WeatherStation{"Saint-Pierre", 5.7},
 	WeatherStation{"Salt Lake City", 11.6},
 	WeatherStation{"San Antonio", 20.8},
 	WeatherStation{"San Diego", 17.8},
 	WeatherStation{"San Francisco", 14.6},
 	WeatherStation{"San Jose", 16.4},
 	WeatherStation{"San José", 22.6},
 	WeatherStation{"San Juan", 27.2},
 	WeatherStation{"San Salvador", 23.1},
 	WeatherStation{"Sana'a", 20.0},
 	WeatherStation{"Santo Domingo", 25.9},
 	WeatherStation{"Sapporo", 8.9},
 	WeatherStation{"Sarajevo", 10.1},
 	WeatherStation{"Saskatoon", 3.3},
 	WeatherStation{"Seattle", 11.3},
 	WeatherStation{"Ségou", 28.0},
 	WeatherStation{"Seoul", 12.5},
 	WeatherStation{"Seville", 19.2},
 	WeatherStation{"Shanghai", 16.7},
 	WeatherStation{"Singapore", 27.0},
 	WeatherStation{"Skopje", 12.4},
 	WeatherStation{"Sochi", 14.2},
 	WeatherStation{"Sofia", 10.6},
 	WeatherStation{"Sokoto", 28.0},
 	WeatherStation{"Split", 16.1},
 	WeatherStation{"St. John's", 5.0},
 	WeatherStation{"St. Louis", 13.9},
 	WeatherStation{"Stockholm", 6.6},
 	WeatherStation{"Surabaya", 27.1},
 	WeatherStation{"Suva", 25.6},
 	WeatherStation{"Suwałki", 7.2},
 	WeatherStation{"Sydney", 17.7},
 	WeatherStation{"Tabora", 23.0},
 	WeatherStation{"Tabriz", 12.6},
 	WeatherStation{"Taipei", 23.0},
 	WeatherStation{"Tallinn", 6.4},
 	WeatherStation{"Tamale", 27.9},
 	WeatherStation{"Tamanrasset", 21.7},
 	WeatherStation{"Tampa", 22.9},
 	WeatherStation{"Tashkent", 14.8},
 	WeatherStation{"Tauranga", 14.8},
 	WeatherStation{"Tbilisi", 12.9},
 	WeatherStation{"Tegucigalpa", 21.7},
 	WeatherStation{"Tehran", 17.0},
 	WeatherStation{"Tel Aviv", 20.0},
 	WeatherStation{"Thessaloniki", 16.0},
 	WeatherStation{"Thiès", 24.0},
 	WeatherStation{"Tijuana", 17.8},
 	WeatherStation{"Timbuktu", 28.0},
 	WeatherStation{"Tirana", 15.2},
 	WeatherStation{"Toamasina", 23.4},
 	WeatherStation{"Tokyo", 15.4},
 	WeatherStation{"Toliara", 24.1},
 	WeatherStation{"Toluca", 12.4},
 	WeatherStation{"Toronto", 9.4},
 	WeatherStation{"Tripoli", 20.0},
 	WeatherStation{"Tromsø", 2.9},
 	WeatherStation{"Tucson", 20.9},
 	WeatherStation{"Tunis", 18.4},
 	WeatherStation{"Ulaanbaatar", -0.4},
 	WeatherStation{"Upington", 20.4},
 	WeatherStation{"Ürümqi", 7.4},
 	WeatherStation{"Vaduz", 10.1},
 	WeatherStation{"Valencia", 18.3},
 	WeatherStation{"Valletta", 18.8},
 	WeatherStation{"Vancouver", 10.4},
 	WeatherStation{"Veracruz", 25.4},
 	WeatherStation{"Vienna", 10.4},
 	WeatherStation{"Vientiane", 25.9},
 	WeatherStation{"Villahermosa", 27.1},
 	WeatherStation{"Vilnius", 6.0},
 	WeatherStation{"Virginia Beach", 15.8},
 	WeatherStation{"Vladivostok", 4.9},
 	WeatherStation{"Warsaw", 8.5},
 	WeatherStation{"Washington, D.C.", 14.6},
 	WeatherStation{"Wau", 27.8},
 	WeatherStation{"Wellington", 12.9},
 	WeatherStation{"Whitehorse", -0.1},
 	WeatherStation{"Wichita", 13.9},
 	WeatherStation{"Willemstad", 28.0},
 	WeatherStation{"Winnipeg", 3.0},
 	WeatherStation{"Wrocław", 9.6},
 	WeatherStation{"Xi'an", 14.1},
 	WeatherStation{"Yakutsk", -8.8},
 	WeatherStation{"Yangon", 27.5},
 	WeatherStation{"Yaoundé", 23.8},
 	WeatherStation{"Yellowknife", -4.3},
 	WeatherStation{"Yerevan", 12.4},
 	WeatherStation{"Yinchuan", 9.0},
 	WeatherStation{"Zagreb", 10.7},
 	WeatherStation{"Zanzibar City", 26.0},
 	WeatherStation{"Zürich", 9.3},
 }

 func main() {
 	fmt.Println("Starting measurements generation")

 	cpuprofile := flag.String("cpuprofile", "", "file to write cpu profile to")
 	memprofile := flag.String("memprofile", "", "file to write memory profile to")
 	flag.Parse()

 	if *cpuprofile != "" {
 		f, err := os.Create(*cpuprofile)
 		if err != nil {
 			log.Fatal("CPU profile failed:", err)
 		}
 		defer f.Close()
 		pprof.StartCPUProfile(f)
 		defer pprof.StopCPUProfile()
 	}

 	start := time.Now()
 	sampleCount := 1_000_000_000

 	file, _ := os.OpenFile(MEASUREMENT_FILE, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0o600)
 	defer file.Close()

 	bufferedWriter := bufio.NewWriterSize(file, 1*1024*1024)

 	lenStations := len(stations)

 	for range sampleCount {
 		idx := rand.Int() % lenStations
 		station := stations[idx]
 		// NOTES: to have FormatFloat take a hotpath for
 		// conversion, use -1 as the precision as that
 		// triggers a ryu inspired codepath
 		// temp := strconv.FormatFloat(station.measurement(), 'f', -1, 32)

 		// NOTES: We abuse the fact that in the dataset, the
 		// max number of digits are 3 with at max 1 digit
 		// after the dot separator
 		tempF := station.measurement()        // 29.4
 		tempL := int(tempF)                   // 29
 		tempR := int(tempF*10) - (tempL * 10) // 4

 		bufferedWriter.WriteString(station.id)
 		bufferedWriter.WriteByte(';')
 		// this forces strconv.Itoa to take the small int fast path
 		// for this dataset specifically
 		if tempL < 0 {
 			bufferedWriter.WriteByte('-')
 			tempL = -tempL
 		}
 		if tempL < 10 {
 			bufferedWriter.WriteByte(byte('0' + tempL))
 		} else if tempL < 100 {
 			d1 := tempL / 10
 			d2 := tempL - (d1 * 10)
 			bufferedWriter.WriteByte(byte('0' + d1))
 			bufferedWriter.WriteByte(byte('0' + d2))
 		} else {
 			bufferedWriter.WriteString(strconv.Itoa(tempL))
 		}
 		bufferedWriter.WriteByte('.')
 		// absolute(tempR) as we can't have a sign after . in
 		// a float
 		if tempR < 0 {
 			tempR = -tempR
 		}
 		bufferedWriter.WriteByte(byte('0' + tempR))
 		bufferedWriter.WriteByte('\n')
 	}

 	_ = bufferedWriter.Flush()

 	fmt.Printf("Done in %v\n", time.Since(start))

 	// NOTES: Memory profile of allocations requires
 	// that the program execute and produce allocations
 	// which requires the program do work. This is why
 	// this code is after all the work.
 	if *memprofile != "" {
 		f, err := os.Create(*memprofile)
 		if err != nil {
 			log.Fatal(err)
 		}
 		defer f.Close()
 		runtime.GC() // get up to date mem usage data
 		allocProf := pprof.Lookup("allocs")
 		if err := allocProf.WriteTo(f, 0); err != nil {
 			log.Fatal("Memory profile failed: ", err)
 		}
 	}
 }
	// Authors: http://github.com/ctbur and http://github.com/zeusdeux
	// Copyright 2025-forever
	// Do whatever you want with the source. Make sure to attribute http://github.com/ctbur and http://github.com/zeusdeux
	// THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

	package main

	import (
	"bufio"
	"flag"
	"fmt"
	"log"
	"math/rand"
	"os"
	"runtime"
	"runtime/pprof"
	"strconv"
	"time"
	)

	type WeatherStation struct {
	id string
	meanTemperature float64
	}

	func (r *WeatherStation) measurement() float64 {
	m := rand.NormFloat64()*10 + r.meanTemperature
	return m
	}

	const MEASUREMENT_FILE = "./measurements-go.txt"

	var stations = []WeatherStation{
	WeatherStation{"Abha", 18.0},
	WeatherStation{"Abidjan", 26.0},
	WeatherStation{"Abéché", 29.4},
	WeatherStation{"Accra", 26.4},
	WeatherStation{"Addis Ababa", 16.0},
	WeatherStation{"Adelaide", 17.3},
	WeatherStation{"Aden", 29.1},
	WeatherStation{"Ahvaz", 25.4},
	WeatherStation{"Albuquerque", 14.0},
	WeatherStation{"Alexandra", 11.0},
	WeatherStation{"Alexandria", 20.0},
	WeatherStation{"Algiers", 18.2},
	WeatherStation{"Alice Springs", 21.0},
	WeatherStation{"Almaty", 10.0},
	WeatherStation{"Amsterdam", 10.2},
	WeatherStation{"Anadyr", -6.9},
	WeatherStation{"Anchorage", 2.8},
	WeatherStation{"Andorra la Vella", 9.8},
	WeatherStation{"Ankara", 12.0},
	WeatherStation{"Antananarivo", 17.9},
	WeatherStation{"Antsiranana", 25.2},
	WeatherStation{"Arkhangelsk", 1.3},
	WeatherStation{"Ashgabat", 17.1},
	WeatherStation{"Asmara", 15.6},
	WeatherStation{"Assab", 30.5},
	WeatherStation{"Astana", 3.5},
	WeatherStation{"Athens", 19.2},
	WeatherStation{"Atlanta", 17.0},
	WeatherStation{"Auckland", 15.2},
	WeatherStation{"Austin", 20.7},
	WeatherStation{"Baghdad", 22.77},
	WeatherStation{"Baguio", 19.5},
	WeatherStation{"Baku", 15.1},
	WeatherStation{"Baltimore", 13.1},
	WeatherStation{"Bamako", 27.8},
	WeatherStation{"Bangkok", 28.6},
	WeatherStation{"Bangui", 26.0},
	WeatherStation{"Banjul", 26.0},
	WeatherStation{"Barcelona", 18.2},
	WeatherStation{"Bata", 25.1},
	WeatherStation{"Batumi", 14.0},
	WeatherStation{"Beijing", 12.9},
	WeatherStation{"Beirut", 20.9},
	WeatherStation{"Belgrade", 12.5},
	WeatherStation{"Belize City", 26.7},
	WeatherStation{"Benghazi", 19.9},
	WeatherStation{"Bergen", 7.7},
	WeatherStation{"Berlin", 10.3},
	WeatherStation{"Bilbao", 14.7},
	WeatherStation{"Birao", 26.5},
	WeatherStation{"Bishkek", 11.3},
	WeatherStation{"Bissau", 27.0},
	WeatherStation{"Blantyre", 22.2},
	WeatherStation{"Bloemfontein", 15.6},
	WeatherStation{"Boise", 11.4},
	WeatherStation{"Bordeaux", 14.2},
	WeatherStation{"Bosaso", 30.0},
	WeatherStation{"Boston", 10.9},
	WeatherStation{"Bouaké", 26.0},
	WeatherStation{"Bratislava", 10.5},
	WeatherStation{"Brazzaville", 25.0},
	WeatherStation{"Bridgetown", 27.0},
	WeatherStation{"Brisbane", 21.4},
	WeatherStation{"Brussels", 10.5},
	WeatherStation{"Bucharest", 10.8},
	WeatherStation{"Budapest", 11.3},
	WeatherStation{"Bujumbura", 23.8},
	WeatherStation{"Bulawayo", 18.9},
	WeatherStation{"Burnie", 13.1},
	WeatherStation{"Busan", 15.0},
	WeatherStation{"Cabo San Lucas", 23.9},
	WeatherStation{"Cairns", 25.0},
	WeatherStation{"Cairo", 21.4},
	WeatherStation{"Calgary", 4.4},
	WeatherStation{"Canberra", 13.1},
	WeatherStation{"Cape Town", 16.2},
	WeatherStation{"Changsha", 17.4},
	WeatherStation{"Charlotte", 16.1},
	WeatherStation{"Chiang Mai", 25.8},
	WeatherStation{"Chicago", 9.8},
	WeatherStation{"Chihuahua", 18.6},
	WeatherStation{"Chișinău", 10.2},
	WeatherStation{"Chittagong", 25.9},
	WeatherStation{"Chongqing", 18.6},
	WeatherStation{"Christchurch", 12.2},
	WeatherStation{"City of San Marino", 11.8},
	WeatherStation{"Colombo", 27.4},
	WeatherStation{"Columbus", 11.7},
	WeatherStation{"Conakry", 26.4},
	WeatherStation{"Copenhagen", 9.1},
	WeatherStation{"Cotonou", 27.2},
	WeatherStation{"Cracow", 9.3},
	WeatherStation{"Da Lat", 17.9},
	WeatherStation{"Da Nang", 25.8},
	WeatherStation{"Dakar", 24.0},
	WeatherStation{"Dallas", 19.0},
	WeatherStation{"Damascus", 17.0},
	WeatherStation{"Dampier", 26.4},
	WeatherStation{"Dar es Salaam", 25.8},
	WeatherStation{"Darwin", 27.6},
	WeatherStation{"Denpasar", 23.7},
	WeatherStation{"Denver", 10.4},
	WeatherStation{"Detroit", 10.0},
	WeatherStation{"Dhaka", 25.9},
	WeatherStation{"Dikson", -11.1},
	WeatherStation{"Dili", 26.6},
	WeatherStation{"Djibouti", 29.9},
	WeatherStation{"Dodoma", 22.7},
	WeatherStation{"Dolisie", 24.0},
	WeatherStation{"Douala", 26.7},
	WeatherStation{"Dubai", 26.9},
	WeatherStation{"Dublin", 9.8},
	WeatherStation{"Dunedin", 11.1},
	WeatherStation{"Durban", 20.6},
	WeatherStation{"Dushanbe", 14.7},
	WeatherStation{"Edinburgh", 9.3},
	WeatherStation{"Edmonton", 4.2},
	WeatherStation{"El Paso", 18.1},
	WeatherStation{"Entebbe", 21.0},
	WeatherStation{"Erbil", 19.5},
	WeatherStation{"Erzurum", 5.1},
	WeatherStation{"Fairbanks", -2.3},
	WeatherStation{"Fianarantsoa", 17.9},
	WeatherStation{"Flores, Petén", 26.4},
	WeatherStation{"Frankfurt", 10.6},
	WeatherStation{"Fresno", 17.9},
	WeatherStation{"Fukuoka", 17.0},
	WeatherStation{"Gabès", 19.5},
	WeatherStation{"Gaborone", 21.0},
	WeatherStation{"Gagnoa", 26.0},
	WeatherStation{"Gangtok", 15.2},
	WeatherStation{"Garissa", 29.3},
	WeatherStation{"Garoua", 28.3},
	WeatherStation{"George Town", 27.9},
	WeatherStation{"Ghanzi", 21.4},
	WeatherStation{"Gjoa Haven", -14.4},
	WeatherStation{"Guadalajara", 20.9},
	WeatherStation{"Guangzhou", 22.4},
	WeatherStation{"Guatemala City", 20.4},
	WeatherStation{"Halifax", 7.5},
	WeatherStation{"Hamburg", 9.7},
	WeatherStation{"Hamilton", 13.8},
	WeatherStation{"Hanga Roa", 20.5},
	WeatherStation{"Hanoi", 23.6},
	WeatherStation{"Harare", 18.4},
	WeatherStation{"Harbin", 5.0},
	WeatherStation{"Hargeisa", 21.7},
	WeatherStation{"Hat Yai", 27.0},
	WeatherStation{"Havana", 25.2},
	WeatherStation{"Helsinki", 5.9},
	WeatherStation{"Heraklion", 18.9},
	WeatherStation{"Hiroshima", 16.3},
	WeatherStation{"Ho Chi Minh City", 27.4},
	WeatherStation{"Hobart", 12.7},
	WeatherStation{"Hong Kong", 23.3},
	WeatherStation{"Honiara", 26.5},
	WeatherStation{"Honolulu", 25.4},
	WeatherStation{"Houston", 20.8},
	WeatherStation{"Ifrane", 11.4},
	WeatherStation{"Indianapolis", 11.8},
	WeatherStation{"Iqaluit", -9.3},
	WeatherStation{"Irkutsk", 1.0},
	WeatherStation{"Istanbul", 13.9},
	WeatherStation{"İzmir", 17.9},
	WeatherStation{"Jacksonville", 20.3},
	WeatherStation{"Jakarta", 26.7},
	WeatherStation{"Jayapura", 27.0},
	WeatherStation{"Jerusalem", 18.3},
	WeatherStation{"Johannesburg", 15.5},
	WeatherStation{"Jos", 22.8},
	WeatherStation{"Juba", 27.8},
	WeatherStation{"Kabul", 12.1},
	WeatherStation{"Kampala", 20.0},
	WeatherStation{"Kandi", 27.7},
	WeatherStation{"Kankan", 26.5},
	WeatherStation{"Kano", 26.4},
	WeatherStation{"Kansas City", 12.5},
	WeatherStation{"Karachi", 26.0},
	WeatherStation{"Karonga", 24.4},
	WeatherStation{"Kathmandu", 18.3},
	WeatherStation{"Khartoum", 29.9},
	WeatherStation{"Kingston", 27.4},
	WeatherStation{"Kinshasa", 25.3},
	WeatherStation{"Kolkata", 26.7},
	WeatherStation{"Kuala Lumpur", 27.3},
	WeatherStation{"Kumasi", 26.0},
	WeatherStation{"Kunming", 15.7},
	WeatherStation{"Kuopio", 3.4},
	WeatherStation{"Kuwait City", 25.7},
	WeatherStation{"Kyiv", 8.4},
	WeatherStation{"Kyoto", 15.8},
	WeatherStation{"La Ceiba", 26.2},
	WeatherStation{"La Paz", 23.7},
	WeatherStation{"Lagos", 26.8},
	WeatherStation{"Lahore", 24.3},
	WeatherStation{"Lake Havasu City", 23.7},
	WeatherStation{"Lake Tekapo", 8.7},
	WeatherStation{"Las Palmas de Gran Canaria", 21.2},
	WeatherStation{"Las Vegas", 20.3},
	WeatherStation{"Launceston", 13.1},
	WeatherStation{"Lhasa", 7.6},
	WeatherStation{"Libreville", 25.9},
	WeatherStation{"Lisbon", 17.5},
	WeatherStation{"Livingstone", 21.8},
	WeatherStation{"Ljubljana", 10.9},
	WeatherStation{"Lodwar", 29.3},
	WeatherStation{"Lomé", 26.9},
	WeatherStation{"London", 11.3},
	WeatherStation{"Los Angeles", 18.6},
	WeatherStation{"Louisville", 13.9},
	WeatherStation{"Luanda", 25.8},
	WeatherStation{"Lubumbashi", 20.8},
	WeatherStation{"Lusaka", 19.9},
	WeatherStation{"Luxembourg City", 9.3},
	WeatherStation{"Lviv", 7.8},
	WeatherStation{"Lyon", 12.5},
	WeatherStation{"Madrid", 15.0},
	WeatherStation{"Mahajanga", 26.3},
	WeatherStation{"Makassar", 26.7},
	WeatherStation{"Makurdi", 26.0},
	WeatherStation{"Malabo", 26.3},
	WeatherStation{"Malé", 28.0},
	WeatherStation{"Managua", 27.3},
	WeatherStation{"Manama", 26.5},
	WeatherStation{"Mandalay", 28.0},
	WeatherStation{"Mango", 28.1},
	WeatherStation{"Manila", 28.4},
	WeatherStation{"Maputo", 22.8},
	WeatherStation{"Marrakesh", 19.6},
	WeatherStation{"Marseille", 15.8},
	WeatherStation{"Maun", 22.4},
	WeatherStation{"Medan", 26.5},
	WeatherStation{"Mek'ele", 22.7},
	WeatherStation{"Melbourne", 15.1},
	WeatherStation{"Memphis", 17.2},
	WeatherStation{"Mexicali", 23.1},
	WeatherStation{"Mexico City", 17.5},
	WeatherStation{"Miami", 24.9},
	WeatherStation{"Milan", 13.0},
	WeatherStation{"Milwaukee", 8.9},
	WeatherStation{"Minneapolis", 7.8},
	WeatherStation{"Minsk", 6.7},
	WeatherStation{"Mogadishu", 27.1},
	WeatherStation{"Mombasa", 26.3},
	WeatherStation{"Monaco", 16.4},
	WeatherStation{"Moncton", 6.1},
	WeatherStation{"Monterrey", 22.3},
	WeatherStation{"Montreal", 6.8},
	WeatherStation{"Moscow", 5.8},
	WeatherStation{"Mumbai", 27.1},
	WeatherStation{"Murmansk", 0.6},
	WeatherStation{"Muscat", 28.0},
	WeatherStation{"Mzuzu", 17.7},
	WeatherStation{"N'Djamena", 28.3},
	WeatherStation{"Naha", 23.1},
	WeatherStation{"Nairobi", 17.8},
	WeatherStation{"Nakhon Ratchasima", 27.3},
	WeatherStation{"Napier", 14.6},
	WeatherStation{"Napoli", 15.9},
	WeatherStation{"Nashville", 15.4},
	WeatherStation{"Nassau", 24.6},
	WeatherStation{"Ndola", 20.3},
	WeatherStation{"New Delhi", 25.0},
	WeatherStation{"New Orleans", 20.7},
	WeatherStation{"New York City", 12.9},
	WeatherStation{"Ngaoundéré", 22.0},
	WeatherStation{"Niamey", 29.3},
	WeatherStation{"Nicosia", 19.7},
	WeatherStation{"Niigata", 13.9},
	WeatherStation{"Nouadhibou", 21.3},
	WeatherStation{"Nouakchott", 25.7},
	WeatherStation{"Novosibirsk", 1.7},
	WeatherStation{"Nuuk", -1.4},
	WeatherStation{"Odesa", 10.7},
	WeatherStation{"Odienné", 26.0},
	WeatherStation{"Oklahoma City", 15.9},
	WeatherStation{"Omaha", 10.6},
	WeatherStation{"Oranjestad", 28.1},
	WeatherStation{"Oslo", 5.7},
	WeatherStation{"Ottawa", 6.6},
	WeatherStation{"Ouagadougou", 28.3},
	WeatherStation{"Ouahigouya", 28.6},
	WeatherStation{"Ouarzazate", 18.9},
	WeatherStation{"Oulu", 2.7},
	WeatherStation{"Palembang", 27.3},
	WeatherStation{"Palermo", 18.5},
	WeatherStation{"Palm Springs", 24.5},
	WeatherStation{"Palmerston North", 13.2},
	WeatherStation{"Panama City", 28.0},
	WeatherStation{"Parakou", 26.8},
	WeatherStation{"Paris", 12.3},
	WeatherStation{"Perth", 18.7},
	WeatherStation{"Petropavlovsk-Kamchatsky", 1.9},
	WeatherStation{"Philadelphia", 13.2},
	WeatherStation{"Phnom Penh", 28.3},
	WeatherStation{"Phoenix", 23.9},
	WeatherStation{"Pittsburgh", 10.8},
	WeatherStation{"Podgorica", 15.3},
	WeatherStation{"Pointe-Noire", 26.1},
	WeatherStation{"Pontianak", 27.7},
	WeatherStation{"Port Moresby", 26.9},
	WeatherStation{"Port Sudan", 28.4},
	WeatherStation{"Port Vila", 24.3},
	WeatherStation{"Port-Gentil", 26.0},
	WeatherStation{"Portland (OR}", 12.4},
	WeatherStation{"Porto", 15.7},
	WeatherStation{"Prague", 8.4},
	WeatherStation{"Praia", 24.4},
	WeatherStation{"Pretoria", 18.2},
	WeatherStation{"Pyongyang", 10.8},
	WeatherStation{"Rabat", 17.2},
	WeatherStation{"Rangpur", 24.4},
	WeatherStation{"Reggane", 28.3},
	WeatherStation{"Reykjavík", 4.3},
	WeatherStation{"Riga", 6.2},
	WeatherStation{"Riyadh", 26.0},
	WeatherStation{"Rome", 15.2},
	WeatherStation{"Roseau", 26.2},
	WeatherStation{"Rostov-on-Don", 9.9},
	WeatherStation{"Sacramento", 16.3},
	WeatherStation{"Saint Petersburg", 5.8},
	WeatherStation{"Saint-Pierre", 5.7},
	WeatherStation{"Salt Lake City", 11.6},
	WeatherStation{"San Antonio", 20.8},
	WeatherStation{"San Diego", 17.8},
	WeatherStation{"San Francisco", 14.6},
	WeatherStation{"San Jose", 16.4},
	WeatherStation{"San José", 22.6},
	WeatherStation{"San Juan", 27.2},
	WeatherStation{"San Salvador", 23.1},
	WeatherStation{"Sana'a", 20.0},
	WeatherStation{"Santo Domingo", 25.9},
	WeatherStation{"Sapporo", 8.9},
	WeatherStation{"Sarajevo", 10.1},
	WeatherStation{"Saskatoon", 3.3},
	WeatherStation{"Seattle", 11.3},
	WeatherStation{"Ségou", 28.0},
	WeatherStation{"Seoul", 12.5},
	WeatherStation{"Seville", 19.2},
	WeatherStation{"Shanghai", 16.7},
	WeatherStation{"Singapore", 27.0},
	WeatherStation{"Skopje", 12.4},
	WeatherStation{"Sochi", 14.2},
	WeatherStation{"Sofia", 10.6},
	WeatherStation{"Sokoto", 28.0},
	WeatherStation{"Split", 16.1},
	WeatherStation{"St. John's", 5.0},
	WeatherStation{"St. Louis", 13.9},
	WeatherStation{"Stockholm", 6.6},
	WeatherStation{"Surabaya", 27.1},
	WeatherStation{"Suva", 25.6},
	WeatherStation{"Suwałki", 7.2},
	WeatherStation{"Sydney", 17.7},
	WeatherStation{"Tabora", 23.0},
	WeatherStation{"Tabriz", 12.6},
	WeatherStation{"Taipei", 23.0},
	WeatherStation{"Tallinn", 6.4},
	WeatherStation{"Tamale", 27.9},
	WeatherStation{"Tamanrasset", 21.7},
	WeatherStation{"Tampa", 22.9},
	WeatherStation{"Tashkent", 14.8},
	WeatherStation{"Tauranga", 14.8},
	WeatherStation{"Tbilisi", 12.9},
	WeatherStation{"Tegucigalpa", 21.7},
	WeatherStation{"Tehran", 17.0},
	WeatherStation{"Tel Aviv", 20.0},
	WeatherStation{"Thessaloniki", 16.0},
	WeatherStation{"Thiès", 24.0},
	WeatherStation{"Tijuana", 17.8},
	WeatherStation{"Timbuktu", 28.0},
	WeatherStation{"Tirana", 15.2},
	WeatherStation{"Toamasina", 23.4},
	WeatherStation{"Tokyo", 15.4},
	WeatherStation{"Toliara", 24.1},
	WeatherStation{"Toluca", 12.4},
	WeatherStation{"Toronto", 9.4},
	WeatherStation{"Tripoli", 20.0},
	WeatherStation{"Tromsø", 2.9},
	WeatherStation{"Tucson", 20.9},
	WeatherStation{"Tunis", 18.4},
	WeatherStation{"Ulaanbaatar", -0.4},
	WeatherStation{"Upington", 20.4},
	WeatherStation{"Ürümqi", 7.4},
	WeatherStation{"Vaduz", 10.1},
	WeatherStation{"Valencia", 18.3},
	WeatherStation{"Valletta", 18.8},
	WeatherStation{"Vancouver", 10.4},
	WeatherStation{"Veracruz", 25.4},
	WeatherStation{"Vienna", 10.4},
	WeatherStation{"Vientiane", 25.9},
	WeatherStation{"Villahermosa", 27.1},
	WeatherStation{"Vilnius", 6.0},
	WeatherStation{"Virginia Beach", 15.8},
	WeatherStation{"Vladivostok", 4.9},
	WeatherStation{"Warsaw", 8.5},
	WeatherStation{"Washington, D.C.", 14.6},
	WeatherStation{"Wau", 27.8},
	WeatherStation{"Wellington", 12.9},
	WeatherStation{"Whitehorse", -0.1},
	WeatherStation{"Wichita", 13.9},
	WeatherStation{"Willemstad", 28.0},
	WeatherStation{"Winnipeg", 3.0},
	WeatherStation{"Wrocław", 9.6},
	WeatherStation{"Xi'an", 14.1},
	WeatherStation{"Yakutsk", -8.8},
	WeatherStation{"Yangon", 27.5},
	WeatherStation{"Yaoundé", 23.8},
	WeatherStation{"Yellowknife", -4.3},
	WeatherStation{"Yerevan", 12.4},
	WeatherStation{"Yinchuan", 9.0},
	WeatherStation{"Zagreb", 10.7},
	WeatherStation{"Zanzibar City", 26.0},
	WeatherStation{"Zürich", 9.3},
	}

	func main() {
	fmt.Println("Starting measurements generation")

	cpuprofile := flag.String("cpuprofile", "", "file to write cpu profile to")
	memprofile := flag.String("memprofile", "", "file to write memory profile to")
	flag.Parse()

	if *cpuprofile != "" {
	f, err := os.Create(*cpuprofile)
	if err != nil {
	log.Fatal("CPU profile failed:", err)
	}
	defer f.Close()
	pprof.StartCPUProfile(f)
	defer pprof.StopCPUProfile()
	}

	start := time.Now()
	sampleCount := 1_000_000_000

	file, _ := os.OpenFile(MEASUREMENT_FILE, os.O_CREATE\|os.O_WRONLY\|os.O_TRUNC, 0o600)
	defer file.Close()

	bufferedWriter := bufio.NewWriterSize(file, 110241024)

	lenStations := len(stations)

	for range sampleCount {
	idx := rand.Int() % lenStations
	station := stations[idx]
	// NOTES: to have FormatFloat take a hotpath for
	// conversion, use -1 as the precision as that
	// triggers a ryu inspired codepath
	// temp := strconv.FormatFloat(station.measurement(), 'f', -1, 32)

	// NOTES: We abuse the fact that in the dataset, the
	// max number of digits are 3 with at max 1 digit
	// after the dot separator
	tempF := station.measurement() // 29.4
	tempL := int(tempF) // 29
	tempR := int(tempF10) - (tempL 10) // 4

	bufferedWriter.WriteString(station.id)
	bufferedWriter.WriteByte(';')
	// this forces strconv.Itoa to take the small int fast path
	// for this dataset specifically
	if tempL < 0 {
	bufferedWriter.WriteByte('-')
	tempL = -tempL
	}
	if tempL < 10 {
	bufferedWriter.WriteByte(byte('0' + tempL))
	} else if tempL < 100 {
	d1 := tempL / 10
	d2 := tempL - (d1 * 10)
	bufferedWriter.WriteByte(byte('0' + d1))
	bufferedWriter.WriteByte(byte('0' + d2))
	} else {
	bufferedWriter.WriteString(strconv.Itoa(tempL))
	}
	bufferedWriter.WriteByte('.')
	// absolute(tempR) as we can't have a sign after . in
	// a float
	if tempR < 0 {
	tempR = -tempR
	}
	bufferedWriter.WriteByte(byte('0' + tempR))
	bufferedWriter.WriteByte('\n')
	}

	_ = bufferedWriter.Flush()

	fmt.Printf("Done in %v\n", time.Since(start))

	// NOTES: Memory profile of allocations requires
	// that the program execute and produce allocations
	// which requires the program do work. This is why
	// this code is after all the work.
	if *memprofile != "" {
	f, err := os.Create(*memprofile)
	if err != nil {
	log.Fatal(err)
	}
	defer f.Close()
	runtime.GC() // get up to date mem usage data
	allocProf := pprof.Lookup("allocs")
	if err := allocProf.WriteTo(f, 0); err != nil {
	log.Fatal("Memory profile failed: ", err)
	}
	}
	}