v/tools/bench/wyhash.v

module main

import (
	hash.fnv1a
	hash.wyhash
	rand
	time
)

fn main() {
	sample_size := 10000000
	min_str_len := 20
	max_str_len := 40
	println('Generating $sample_size strings between $min_str_len - $max_str_len chars long...')
	mut bytepile := []byte
	for _ in 0 .. sample_size * max_str_len {
		bytepile << byte(40 + rand.next(125 - 40))
	}
	mut str_lens := []int
	for _ in 0 .. sample_size {
		str_lens << min_str_len + rand.next(max_str_len - min_str_len)
	}
	println('Hashing each of the generated strings...')
	t0 := time.ticks()
	mut start_pos := 0
	for len in str_lens {
		end_pos := start_pos + len
		str := string(bytepile[start_pos..end_pos],len)
		_ = wyhash.wyhash_c(&str.str, u64(str.len), 1)
		start_pos = end_pos
	}
	t1 := time.ticks()
	d1 := t1 - t0
	println(' * wyhash4 C: ${d1}ms')
	start_pos = 0
	for len in str_lens {
		end_pos := start_pos + len
		str := string(bytepile[start_pos..end_pos],len)
		_ = wyhash.sum64_string(str, 1)
		start_pos = end_pos
	}
	t2 := time.ticks()
	d2 := t2 - t1
	println(' * wyhash4: ${d2}ms')
	start_pos = 0
	for len in str_lens {
		end_pos := start_pos + len
		str := string(bytepile[start_pos..end_pos],len)
		_ = fnv1a.sum64_string(str)
		start_pos = end_pos
	}
	t3 := time.ticks()
	d3 := t3 - t2
	println(' * fnv1a64: ${d3}ms')
}