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perf: metainfo reduce mallocgc (bytedance#199)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| // Copyright 2023 ByteDance Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package metainfo | ||
|
|
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| import "sync" | ||
|
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| type kvstore map[string]string | ||
|
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| var kvpool sync.Pool | ||
|
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| func newKVStore(size ...int) kvstore { | ||
| kvs := kvpool.Get() | ||
| if kvs == nil { | ||
| if len(size) > 0 { | ||
| return make(kvstore, size[0]) | ||
| } | ||
| return make(kvstore) | ||
| } | ||
| return kvs.(kvstore) | ||
| } | ||
|
|
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| func (store kvstore) size() int { | ||
| return len(store) | ||
| } | ||
|
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| func (store kvstore) recycle() { | ||
| /* | ||
| for k := range m { | ||
| delete(m, k) | ||
| } | ||
| ==> | ||
| LEAQ type.map[string]int(SB), AX | ||
| MOVQ AX, (SP) | ||
| MOVQ "".m(SB), AX | ||
| MOVQ AX, 8(SP) | ||
| PCDATA $1, $0 | ||
| CALL runtime.mapclear(SB) | ||
| */ | ||
| for key := range store { | ||
| delete(store, key) | ||
| } | ||
| kvpool.Put(store) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| // Copyright 2023 ByteDance Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
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| package metainfo | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "testing" | ||
| ) | ||
|
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| func TestKVStore(t *testing.T) { | ||
| store := newKVStore() | ||
| store["a"] = "a" | ||
| store["a"] = "b" | ||
| if store["a"] != "b" { | ||
| t.Fatal() | ||
| } | ||
| store.recycle() | ||
| if store["a"] == "b" { | ||
| t.Fatal() | ||
| } | ||
| store = newKVStore() | ||
| if store["a"] == "b" { | ||
| t.Fatal() | ||
| } | ||
| } | ||
|
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| func BenchmarkMap(b *testing.B) { | ||
| for keys := 1; keys <= 1000; keys *= 10 { | ||
| b.Run(fmt.Sprintf("keys=%d", keys), func(b *testing.B) { | ||
| b.ReportAllocs() | ||
| for i := 0; i < b.N; i++ { | ||
| m := make(map[string]string) | ||
| for idx := 0; idx < 1000; idx++ { | ||
| m[fmt.Sprintf("key-%d", idx)] = string('a' + byte(idx%26)) | ||
| } | ||
| } | ||
| }) | ||
| } | ||
| } | ||
|
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| func BenchmarkKVStore(b *testing.B) { | ||
| for keys := 1; keys <= 1000; keys *= 10 { | ||
| b.Run(fmt.Sprintf("keys=%d", keys), func(b *testing.B) { | ||
| b.ReportAllocs() | ||
| for i := 0; i < b.N; i++ { | ||
| m := newKVStore() | ||
| for idx := 0; idx < 1000; idx++ { | ||
| m[fmt.Sprintf("key-%d", idx)] = string('a' + byte(idx%26)) | ||
| } | ||
| m.recycle() | ||
| } | ||
| }) | ||
| } | ||
| } |
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