[fix](HadoopLz4BlockCompression)Fixed the bug that HadoopLz4BlockCompression creates _decompressor every time it decompresses. #37187
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…ression creates _decompressor every time it decompresses.
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| defined(__i386) || defined(_M_IX86) | |||
| #include <libdeflate.h> | |||
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| #include <glog/log_severity.h> | |||
| #include <glog/logging.h> | |||
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warning: duplicate include [readability-duplicate-include]
be/src/util/block_compression.cpp:27:
- #include <glog/log_severity.h>
- #include <glog/logging.h>
+ #include <glog/log_severity.h>
TPC-H: Total hot run time: 40690 ms |
TPC-DS: Total hot run time: 174715 ms |
ClickBench: Total hot run time: 30.42 s |
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AshinGau
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Jul 4, 2024
dataroaring
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…ression creates _decompressor every time it decompresses. (#37187) ## Proposed changes Problem: HadoopLz4BlockCompression uses a singleton mode. Every time its decompression function is called, a new object will be created for its member variable _decompressor. In a multi-threaded scenario, new objects will be created for _decompressor at the same time. Fix method: During the construction phase of HadoopLz4BlockCompression, a new object is created for its member variable _decompressor. When calling the decompression function, there is no need to create a new object for _decompressor.
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Proposed changes
Problem:
HadoopLz4BlockCompression uses a singleton mode.
Every time its decompression function is called, a new object will be created for its member variable _decompressor. In a multi-threaded scenario, new objects will be created for _decompressor at the same time.
Fix method:
During the construction phase of HadoopLz4BlockCompression, a new object is created for its member variable _decompressor. When calling the decompression function, there is no need to create a new object for _decompressor.
Issue Number: close #xxx