desparse cygwin executables/dll #888
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ghost
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Implemented and tested in branch |
rurban
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The cygwin linker up until 1.17.18 creates all its exes and shared libs as sparse files, which reduces startup time of executables by a large percentage (8-10x slower) because the code cannot be mmap'ed and not cached, it must be read byte by byte. Again and again. See http://cygwin.com/ml/cygwin-developers/2012-12/msg00011.html
rurban
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The cygwin linker up until 1.17.18 creates all its exes and shared libs as sparse files, which
reduces startup time of executables by a large percentage (8-10x slower) because the code cannot be mmap'ed and not cached, it must be read byte by byte. Again and again.
With a
tools/dev/cyg-desparsescript as postprocessor the test suite ran ~5x faster.See http://cygwin.com/ml/cygwin-developers/2012-12/msg00011.html
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