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cmd/tools/bench/wyhash.v: use predetermined seed, to ensure comparable results

pull/6064/head
Delyan Angelov 2020-08-03 18:47:10 +03:00
parent 8dede3b535
commit df5625bf68
1 changed files with 14 additions and 6 deletions
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20
cmd/tools/bench/wyhash.v
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@ -6,6 +6,8 @@ import rand
import time import time
fn main() { fn main() {
rand.seed([u32(42), 0])
mut aaa := u64(0)
sample_size := 10000000 sample_size := 10000000
min_str_len := 20 min_str_len := 20
max_str_len := 40 max_str_len := 40
@ -21,32 +23,38 @@ fn main() {
println('Hashing each of the generated strings...') println('Hashing each of the generated strings...')
t0 := time.ticks() t0 := time.ticks()
mut start_pos := 0 mut start_pos := 0
aaa = 0
for len in str_lens { for len in str_lens {
end_pos := start_pos + len end_pos := start_pos + len
str := string(bytepile[start_pos..end_pos],len) str := string(bytepile[start_pos..end_pos], len)
wyhash.wyhash_c(&str.str, u64(str.len), 1) aaa ^= wyhash.wyhash_c(&str.str, u64(str.len), 1)
start_pos = end_pos start_pos = end_pos
} }
println('aaa: $aaa')
t1 := time.ticks() t1 := time.ticks()
d1 := t1 - t0 d1 := t1 - t0
println(' * wyhash4 C: ${d1}ms') println(' * wyhash4 C: ${d1}ms')
start_pos = 0 start_pos = 0
aaa = 0
for len in str_lens { for len in str_lens {
end_pos := start_pos + len end_pos := start_pos + len
str := string(bytepile[start_pos..end_pos],len) str := string(bytepile[start_pos..end_pos], len)
wyhash.sum64_string(str, 1) aaa ^= wyhash.sum64_string(str, 1)
start_pos = end_pos start_pos = end_pos
} }
println('aaa: $aaa')
t2 := time.ticks() t2 := time.ticks()
d2 := t2 - t1 d2 := t2 - t1
println(' * wyhash4: ${d2}ms') println(' * wyhash4: ${d2}ms')
start_pos = 0 start_pos = 0
aaa = 0
for len in str_lens { for len in str_lens {
end_pos := start_pos + len end_pos := start_pos + len
str := string(bytepile[start_pos..end_pos],len) str := string(bytepile[start_pos..end_pos], len)
fnv1a.sum64_string(str) aaa ^= fnv1a.sum64_string(str)
start_pos = end_pos start_pos = end_pos
} }
println('aaa: $aaa')
t3 := time.ticks() t3 := time.ticks()
d3 := t3 - t2 d3 := t3 - t2
println(' * fnv1a64: ${d3}ms') println(' * fnv1a64: ${d3}ms')