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support/scripts: add size-stats-compare script

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Leverage the CSV files produces by size-stats (make graph-size) to allow
for a comparison of rootfs size between two different buildroot
compilations.

The script takes the file-size CSV files of two compilations as input, and
produces a textual report of the differences per package.
Using the -d/--detail flag, the report will show the file size changes
instead of package size changes.
The -t/--threshold option allows to ignore file size differences smaller
or equal than the given threshold (in bytes).

Example output is:

Size difference per package (bytes), threshold = 0
--------------------------------------------------------------------------------
       -8192         busybox
      228572   added dmalloc
      301584   added jq
--------------------------------------------------------------------------------
      521964         TOTAL

or with detailed view:

Size difference per file (bytes), threshold = 0
--------------------------------------------------------------------------------
       -8192         bin/busybox
       18152   added usr/bin/jq
       39252   added usr/bin/dmalloc
       46968   added usr/lib/libdmalloc.so
       47288   added usr/lib/libdmallocxx.so
       47316   added usr/lib/libdmallocth.so
       47748   added usr/lib/libdmallocthcxx.so
      283432   added usr/lib/libjq.so.1.0.4
--------------------------------------------------------------------------------
      521964         TOTAL

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Thomas De Schampheleire
2016-02-02 14:05:59 +01:00
committed by Thomas Petazzoni
parent 8b1c4583ec
commit 8c5afd120e
2 changed files with 137 additions and 0 deletions
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10
docs/manual/common-usage.txt
View File

@@ -317,6 +317,16 @@ The collected filesystem size data is only meaningful after a complete
clean rebuild. Be sure to run +make clean all+ before using +make
graph-size+.
To compare the root filesystem size of two different Buildroot compilations,
for example after adjusting the configuration or when switching to another
Buildroot release, use the +size-stats-compare+ script. It takes two
+file-size-stats.csv+ files (produced by +make graph-size+) as input.
Refer to the help text of this script for more details:
----------------
support/scripts/size-stats-compare -h
----------------
include::eclipse-integration.txt[]
include::advanced.txt[]