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/* Atomic boolean for golang | |
A process-atomic boolean that can be used for signaling between goroutines. | |
Default value = false. (nil structure) | |
*/ | |
package main | |
import "sync/atomic" |
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package main | |
import ( | |
"fmt" | |
"reflect" | |
) | |
type Foo struct { | |
FirstName string `tag_name:"tag 1"` | |
LastName string `tag_name:"tag 2"` |
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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#!/usr/bin/env python | |
# | |
# Converts any integer into a base [BASE] number. I have chosen 62 | |
# as it is meant to represent the integers using all the alphanumeric | |
# characters, [no special characters] = {0..9}, {A..Z}, {a..z} | |
# | |
# I plan on using this to shorten the representation of possibly long ids, | |
# a la url shortenters | |
# |