Revert "use lz4"

This reverts commit 91c71e39436b5a661edb2bfd6b736df33de7089d.
Revert "LZ4 (3)"

This reverts commit f67a9060f217e5616cc4e08c42fc833adbc3651c.
Revert "LZ4 (2)"

This reverts commit bbcd3fb6f33c08b7a991652e5d7b5af3f205fad6.
Revert "LZ4 (1)"

This reverts commit 3a590733cb67351db7adcd7f0c90973530d5a804.