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[#8] hrw: Introduce StringHash() for hashing strings directly

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```
goos: linux
goarch: amd64
pkg: git.frostfs.info/TrueCloudLab/hrw
cpu: 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz
                                         │      6      │                  7                   │
                                         │   sec/op    │    sec/op     vs base                │
SortHashersByValue_Typed_fnv_10-8          248.8n ± 1%   166.9n ±  9%  -32.93% (p=0.000 n=10)
SortHashersByValue_Typed_fnv_100-8         2.195µ ± 6%   1.297µ ±  6%  -40.93% (p=0.000 n=10)
SortHashersByValue_Typed_fnv_1000-8        22.47µ ± 4%   12.42µ ± 10%  -44.73% (p=0.000 n=10)
SortHashersByWeightValueTyped_fnv_10-8     301.7n ± 6%   180.8n ±  4%  -40.09% (p=0.000 n=10)
SortHashersByWeightValueTyped_fnv_100-8    2.526µ ± 1%   1.378µ ±  5%  -45.47% (p=0.000 n=10)
SortHashersByWeightValueTyped_fnv_1000-8   24.37µ ± 2%   12.80µ ±  4%  -47.48% (p=0.000 n=10)
geomean                                    2.472µ        1.430µ        -42.13%

                                         │      6       │                   7                   │
                                         │     B/op     │     B/op      vs base                 │
SortHashersByValue_Typed_fnv_10-8            144.0 ± 0%     144.0 ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByValue_Typed_fnv_100-8           960.0 ± 0%     960.0 ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByValue_Typed_fnv_1000-8        8.062Ki ± 0%   8.062Ki ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByWeightValueTyped_fnv_10-8       144.0 ± 0%     144.0 ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByWeightValueTyped_fnv_100-8      960.0 ± 0%     960.0 ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByWeightValueTyped_fnv_1000-8   8.062Ki ± 0%   8.062Ki ± 0%       ~ (p=1.000 n=10) ¹
geomean                                    1.021Ki        1.021Ki       +0.00%
¹ all samples are equal

                                         │     6      │                  7                  │
                                         │ allocs/op  │ allocs/op   vs base                 │
SortHashersByValue_Typed_fnv_10-8          2.000 ± 0%   2.000 ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByValue_Typed_fnv_100-8         2.000 ± 0%   2.000 ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByValue_Typed_fnv_1000-8        2.000 ± 0%   2.000 ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByWeightValueTyped_fnv_10-8     2.000 ± 0%   2.000 ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByWeightValueTyped_fnv_100-8    2.000 ± 0%   2.000 ± 0%       ~ (p=1.000 n=10) ¹
SortHashersByWeightValueTyped_fnv_1000-8   2.000 ± 0%   2.000 ± 0%       ~ (p=1.000 n=10) ¹
geomean                                    2.000        2.000       +0.00%
¹ all samples are equal
```

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
This commit is contained in:
Evgenii Stratonikov 2023-06-01 21:00:32 +03:00
parent 2ac89c82b6
commit 16a7740ccd
2 changed files with 6 additions and 1 deletions
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5
hrw.go
View file

@ -68,6 +68,11 @@ func Hash(key []byte) uint64 {
return murmur3.Sum64(key)
}
// StringHash uses murmur3 hash to return uint64
func StringHash(key string) uint64 {
return murmur3.StringSum64(key)
}
// Sort receive nodes and hash, and sort it by distance
func Sort(nodes []uint64, hash uint64) []uint64 {
l := len(nodes)

2
hrw_test.go
View file

@ -61,7 +61,7 @@ func Example() {
}
func (h hashString) Hash() uint64 {
return Hash([]byte(h))
return StringHash(string(h))
}
func TestSortSliceByIndex(t *testing.T) {