What's Changed

• Add lzw reader/writer by @klauspost in https://github.com/klauspost/compress/pull/1189
• xpress: add Microsoft XPRESS (MS-XCA) decompression by @MP-GOWTHAM in https://github.com/klauspost/compress/pull/1195
• s2: arm64 assembly encoders, lowered from the amd64 avo program by @lizthegrey in https://github.com/klauspost/compress/pull/1187
• zstd, huff0: improved arm64 lowering, and narrow two table loads to MOVWQZX by @lizthegrey in https://github.com/klauspost/compress/pull/1175
• gzhttp: limit jitter hash to jitterBuffer bytes by @VedantMadane in https://github.com/klauspost/compress/pull/1192
• s2: clamp the Go EncodeBetter skip to match the assembly by @lizthegrey in https://github.com/klauspost/compress/pull/1190
• xxhash: bound input of non-preemptive assembly by @AskAlexSharov in https://github.com/klauspost/compress/pull/1196
• zstd/huff0: fold two ISA-gap x86 idioms in the avo arm64 lowering by @lizthegrey in https://github.com/klauspost/compress/pull/1199
• ci: test against go1.27.x, drop go1.24.x by @lizthegrey in https://github.com/klauspost/compress/pull/1198
• zstd/huff0: break false partial-register dependencies in seqdec/4X decoders by @lizthegrey in https://github.com/klauspost/compress/pull/1197
• flate: Writer L7-9 with dictionary can emit the dictionary to stream by @klauspost in https://github.com/klauspost/compress/pull/1201

New Contributors

• @VedantMadane made their first contribution in https://github.com/klauspost/compress/pull/1192
• @AskAlexSharov made their first contribution in https://github.com/klauspost/compress/pull/1196
• @MP-GOWTHAM made their first contribution in https://github.com/klauspost/compress/pull/1195

Full Changelog: https://github.com/klauspost/compress/compare/v1.19.2...v1.20.0