box.insert with exception performance

main.lua

local clock = require('clock')
box.cfg{}
box.schema.create_space('test', {if_not_exists = true})
box.space.test:create_index('pk', {if_not_exists = true})
local fiber = require('fiber')

fiber.set_max_slice({warn = 2, err = 5})

local function test1()
    for _ = 1, 10000 do
        pcall(box.space.test.insert, box.space.test, {1})
    end
end

local function test2()
    for _ = 1, 10000 do
        if not box.space.test:get(1) then
            box.space.test.insert({1})
        end
    end
end

local function test3()
    for _ = 1, 10000 do
        pcall(error, 'yes')
    end
end

local t1 = clock.time()
test1()
local t2 = clock.time()
test2()
local t3 = clock.time()
test3()
local t4 = clock.time()

print("test_1: ", t2 - t1)
print("test_2: ", t3 - t2)
print("test_3: ", t4 - t3)

result

$ tarantool main.lua
...
test_1:         1.2289569377899
test_2:         0.037437915802002
test_3:         1.1791739463806