Implement zgrep

[Keruspe]

This would be cool to get us closer to being a drop-in replacement for gnu gzip

[dnbaker]

According to this issue, decompression is fundamentally single-threaded and can't be improved using pigz except for handing other portions of the task to other threads, which can sometimes make a small, but not enormous, difference.

You're better using pigz -dc $file | grep <args>, or , if you're streaming, cmd1 | pigz -d | grep <args>.

I am, of course, no contributor or developer of zlib, so I can't speak for @madler, but I wouldn't keep hopes up.

[gcflymoto]

I highly recommend the excellent and stable zutils suite of utilities (zgrep, zcat, zcmp, zdiff, ztest, update), which provides transparent support for several formats, including bzip2, gzip, lzip, xz, and zstd.

https://www.nongnu.org/zutils/zutils.html

The decompressor utility can be configured for each format, including utilizing pigz, or pigz+zlib-ng or isa-l or rapidgzip