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Diffstat (limited to 'programs/README.md')
| -rw-r--r-- | programs/README.md | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/programs/README.md b/programs/README.md index c3a5590d6de5..7668d49a2073 100644 --- a/programs/README.md +++ b/programs/README.md @@ -173,10 +173,13 @@ Benchmark arguments : ``` #### Restricted usage of Environment Variables -Using environment variables to set compression/decompression parameters has security implications. Therefore, -we intentionally restrict its usage. Currently, only `ZSTD_CLEVEL` is supported for setting compression level. +Using environment variables to set parameters has security implications. +Therefore, this avenue is intentionally restricted. +Only `ZSTD_CLEVEL` is supported currently, for setting compression level. +`ZSTD_CLEVEL` can be used to set the level between 1 and 19 (the "normal" range). If the value of `ZSTD_CLEVEL` is not a valid integer, it will be ignored with a warning message. -Note that command line options will override corresponding environment variable settings. +`ZSTD_CLEVEL` just replaces the default compression level (`3`). +It can be overridden by corresponding command line arguments. #### Long distance matching mode The long distance matching mode, enabled with `--long`, is designed to improve |