[coreboot-gerrit] Patch merged into coreboot/master: util/cbfstool: Add cbfs-compression-tool

[gerrit at coreboot.org]

the following patch was just integrated into master:
commit c88d16baaf3e88029b40d43eb254e90613b95187
Author: Patrick Georgi <pgeorgi at chromium.org>
Date:   Wed Jan 11 15:26:58 2017 +0100

    util/cbfstool: Add cbfs-compression-tool
    
    cbfs-compression-tool provides a way to benchmark the compression
    algorithms as used by cbfstool (and coreboot) and allows to
    pre-compress data for later consumption by cbfstool (once it supports
    the format).
    
    For an impression, the benchmark's results on my machine:
    
    measuring 'none'
    compressing 10485760 bytes to 10485760 took 0 seconds
    measuring 'LZMA'
    compressing 10485760 bytes to 1736 took 2 seconds
    measuring 'LZ4'
    compressing 10485760 bytes to 41880 took 0 seconds
    
    And a possible use for external compression, parallel and non-parallel
    (60MB in 53 files compressed to 650KB on a machine with 40 threads):
    
    $ time (ls -1 *.* |xargs -n 1 -P $(nproc) -I '{}' cbfs-compression-tool compress '{}' out/'{}' LZMA)
    
    real	0m0.786s
    user	0m11.440s
    sys	0m0.044s
    
    $ time (ls -1 *.* |xargs -n 1 -P 1 -I '{}' cbfs-compression-tool compress '{}' out/'{}' LZMA)
    
    real	0m10.444s
    user	0m10.280s
    sys	0m0.064s
    
    Change-Id: I40be087e85d09a895b1ed277270350ab65a4d6d4
    Signed-off-by: Patrick Georgi <pgeorgi at chromium.org>
    Reviewed-on: https://review.coreboot.org/18099
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth <martinroth at google.com>


See https://review.coreboot.org/18099 for details.

-gerrit