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zlib: use more memory for a small deflate speedup.

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The LIT_MEM option uses slightly more memory (for base gzip(1),
about 16kiB; according to the author, about 6% for default deflate
settings) for a small speedup.

The performance gain is more noticeable for input data with higher
entropy and less significant for data that is highly compressible,
such as source code and logs.

(cherry picked from commit aea57ebcb1b053370ea1f0e29cdc666291bc5d5e)
This commit is contained in:
Xin LI 2024-02-19 15:01:04 -08:00
parent 87c7f74ff4
commit 984caafec1
1 changed files with 1 additions and 1 deletions
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2
sys/contrib/zlib/deflate.h
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@ -25,7 +25,7 @@
/* define LIT_MEM to slightly increase the speed of deflate (order 1% to 2%) at
the cost of a larger memory footprint */
/* #define LIT_MEM */
#define LIT_MEM
/* ===========================================================================
* Internal compression state.