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authorEelco Dolstra <e.dolstra@tudelft.nl>2006-11-18T18·56+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2006-11-18T18·56+0000
commit0541ddc7e33c35a35efe85b6d6f603efb5bac8c8 (patch)
tree55d80aab366bdfe95cfd9a70f9ced5f03d955d6e /src/nix-store/dotgraph.cc
parent471749ca7eb594660488954d23391f5329d638a4 (diff)
* Turn off synchronisation between C and C++ I/O functions. This
  gives a huge speedup in operations that read or write from standard
  input/output.  (So libstdc++'s I/O isn't that bad, you just have to
  call std::ios::sync_with_stdio(false).)  For instance, `nix-store
  --register-substitutes' went from 1.4 seconds to 0.1 seconds on a
  certain input.  Another victory for Valgrind.

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