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authorEelco Dolstra <eelco.dolstra@logicblox.com>2015-11-25T16·13+0100
committerEelco Dolstra <eelco.dolstra@logicblox.com>2015-11-25T16·13+0100
commitc0d4173263a3077905643d5a044e982fc830f7ff (patch)
tree1e7e0d4df523ab9d50389a837c2e97b66dda129a /local.mk
parentefd6a8c9f63714a9d9e6020211e78de6fc5f8c11 (diff)
Set default binary-caches-parallel-connections to 25
Some benchmarking suggested this as a good value. Running

  $ benchmark -f ... -t 25 -- sh -c 'rm -f /nix/var/nix/binary-cache*; nix-store -r /nix/store/x5z8a2yvz8h6ccmhwrwrp9igg03575jg-nixos-15.09.git.5fd87e1M.drv --dry-run --option binary-caches-parallel-connections <N>'

gave the following mean elapsed times for these values of N:

N=10:  3.3541
N=20:  2.9320
N=25:  2.6690
N=30:  2.9417
N=50:  3.2021
N=100: 3.5718
N=150: 4.2079

Memory usage is also reduced (N=150 used 186 MB, N=25 only 68 MB).

Closes #708.
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