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Generic encoders: use 12-bit lookup table #64

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aklomp opened this issue Dec 3, 2019 · 0 comments
Closed

Generic encoders: use 12-bit lookup table #64

aklomp opened this issue Dec 3, 2019 · 0 comments

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@aklomp
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aklomp commented Dec 3, 2019

Switch from a 6-bit lookup table to a 12-bit lookup table in the Generic32 and Generic64 encoders. Some quick tests show that halving the memory accesses greatly increases performance, at the cost of a larger lookup table (4096 bytes). Not a hard tradeoff.

Tables can be generated with a small Python script. Tables differ for little-endian and big-endian architectures.
aklomp added a commit that referenced this issue Dec 29, 2019
@aklomp
#64: generic encoders: use 12-bit lookup table
e8f610b 
Switch from a 6-bit lookup table to a 12-bit lookup table in the
Generic32 and Generic64 encoders. Some quick tests show that halving the
memory accesses greatly increases performance, at the cost of a larger
lookup table (4096 bytes). Not a hard tradeoff.

Tables can be generated with a small Python script. Tables differ for
little-endian and big-endian architectures.
@aklomp aklomp closed this as completed Dec 29, 2019
@aklomp aklomp mentioned this issue Dec 29, 2019
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