2 commits

Author	SHA1	Message	Date
Bjørn Erik Pedersen	d5eda13cb2	Replace the MD5 hashing of images with xxHash ... Note that we only use this for change detection. The previous implementation invoked `MD5FromReaderFast` that created a MD5 has from 8 64 bytes chunks in the file, which is obviously very fast. The new implementation creates the hash from the entire file and ... seems to be even more effective: ``` name old time/op new time/op delta HashImage-10 9.45µs ±21% 10.89µs ± 1% ~ (p=0.343 n=4+4) name old alloc/op new alloc/op delta HashImage-10 144B ± 0% 8B ± 0% -94.44% (p=0.029 n=4+4) name old allocs/op new allocs/op delta HashImage-10 4.00 ± 0% 1.00 ± 0% -75.00% (p=0.029 n=4+4) ```	2024-07-31 16:44:06 +02:00
Bjørn Erik Pedersen	644d55475d	Add hash.XxHash ... Also move the non crypto hash funcs into this new package. This is much faster than e.g. MD5, especially for larger inputs: ``` BenchmarkXxHash/xxHash_43-10 9917955 112.2 ns/op 56 B/op 4 allocs/op BenchmarkXxHash/mdb5_43-10 6017239 204.1 ns/op 96 B/op 3 allocs/op BenchmarkXxHash/fnv32a_43-10 14407333 82.30 ns/op 16 B/op 1 allocs/op BenchmarkXxHash/xxHash_4300-10 2916892 409.7 ns/op 56 B/op 4 allocs/op BenchmarkXxHash/mdb5_4300-10 159748 7491 ns/op 4912 B/op 3 allocs/op BenchmarkXxHash/fnv32a_4300-10 218210 5510 ns/op 16 B/op 1 allocs/op ``` Fixes #12635	2024-07-06 14:08:15 +02:00