Building CHICKEN twice using ccache, with and without the deterministic build patch.
Clean cache for each test.

Without patch
=============

326.60u 8.78s 335.58r    make PLATFORM=linux C_COMPILER=ccache gcc

cache directory                     /tmp/ccache
primary config                      /tmp/ccache/ccache.conf
secondary config      (readonly)    /etc/ccache.conf
cache hit (direct)                     2
cache hit (preprocessed)               4
cache miss                           224
cache hit rate                      2.61 %
called for link                      110
cleanups performed                     0
files in cache                       450
cache size                          41.6 MB
max cache size                       5.0 GB


With patch
==========

63.73u 2.34s 66.10r      make PLATFORM=linux C_COMPILER=ccache gcc

cache directory                     /tmp/ccache
primary config                      /tmp/ccache/ccache.conf
secondary config      (readonly)    /etc/ccache.conf
cache hit (direct)                   114
cache hit (preprocessed)               1
cache miss                           115
cache hit rate                     50.00 %
called for link                      110
cleanups performed                     0
files in cache                       229
cache size                          21.1 MB
max cache size                       5.0 GB