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mydump,restore: reduce parser memory allocation #108
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Hi contributor, thanks for your PR. This patch needs to be approved by someone of admins. They should reply with "/ok-to-test" to accept this PR for running test automatically. |
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/run-all-tests |
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/run-integration-test |
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/run-all-tests |
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/run-integration-test |
lonng
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@july2993 @GregoryIan PTAL |
IANTHEREAL
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Dec 24, 2018
IANTHEREAL
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Dec 24, 2018
| switch err { | ||
| case io.ErrUnexpectedEOF, io.EOF: | ||
| parser.isLastChunk = true | ||
| fallthrough | ||
| case nil: | ||
| tryAppendTo(&parser.buf, block[:n]) | ||
| parser.remainBuf.Reset() |
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can we omit remainBuf?
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Can not, because of parser.buf reference to appendBuf.Bytes()
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leave a comment above code
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LGTM |
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| @@ -1386,7 +1387,7 @@ func (cr *chunkRestore) restore( | |||
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| // sql -> kv | |||
| start = time.Now() | |||
| kvs, _, err := kvEncoder.SQL2KV(buffer.String()) | |||
| kvs, _, err := kvEncoder.SQL2KV(hack.String(buffer.Bytes())) | |||
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We should change the argument type of SQL2KV from string to byte slice. You should not use hack package usually.
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What problem does this PR solve?
Reduce parser memory allocation
Benchmark (SQL file: 1529669bytes ~1.5MB, Chunk size: 64KB, Rows: 223):
Previous benchmark ref: #107,
BenchmarkChunkRestoreReuseBuffer3is the latest version.What is changed and how it works?
Add blockBuf to parser
Check List
Tests
Code changes
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