1586563 - LSNG: Switch to LZ4 compression

Status: NEW

(Core :: Storage: localStorage & sessionStorage, enhancement, P2)

Description

[Jan Varga [:janv]]

https://searchfox.org/mozilla-central/rev/deaf58acd27bc663750548e303ac2b461a821cf8/mfbt/Compression.h#27
"Compared to Google's Snappy it is faster to compress and decompress and generally produces output of about the same size."

https://github.com/lz4/lz4
Decompression seems much faster.

We don't have to upgrade all db files. We can just introduce new compression type and use it for new or updated values. At the moment the compressed column can be either 0 or 1. We can add 2 for LZ4.