squashfs: cache the last block decompressed in the file for 10x speedup #202
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Before this change, we would spend an awful lot of CPU time reading and decompressing the same block to only read a small part from it. This change caches the last block used in the file handle and for typical block sizes used in reads this makes a 10x difference in throughput.
deitch
approved these changes
Dec 22, 2023
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This is great. Solid improvement. |
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Before this change, we would spend an awful lot of CPU time reading
and decompressing the same block to only read a small part from it.
This change caches the last block used in the file handle and for
typical block sizes used in reads this makes a 10x difference in
throughput.