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Avoid copy on Leopard GF8 #227

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Avoid copy on Leopard GF8 #227

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@klauspost klauspost commented Nov 21, 2022 •
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WIP: Still a subtle bug

Speed is encouraging though:

BenchmarkEncodeLeopard50x20x1M-32    	     100	  10201946 ns/op	7194.74 MB/s	    3403 B/op	       3 allocs/op
BenchmarkEncodeLeopard50x20x1M-32            147           8052620 ns/op        9115.09 MB/s         816 B/op         34 allocs/op

@klauspost
Avoid copy on Leopard GF8
8b1c2b8 
WIP: Still a subtle bug

Speed is encouraging though:

```
BenchmarkEncodeLeopard50x20x1M-32    	     100	  10201946 ns/op	7194.74 MB/s	    3403 B/op	       3 allocs/op
BenchmarkEncodeLeopard50x20x1M-32            153           7816916 ns/op        9389.93 MB/s        5016 B/op         35 allocs/op
```
@klauspost
Pool work shards.
a97e582
@klauspost
Use zero array instead of pool.
87f23e8
@klauspost
Use first for size.
52b7f16
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