[Kst] : Huge performance problem under Windows
syntheticpp at gmx.net
Sun Nov 15 14:36:09 CET 2009
Peter Kümmel wrote:
> Peter Kümmel wrote:
>> atof is dead slow on Windows, on Linux atof is magnitudes faster.
>> Measured with attached patch.
> I've replaced msvc's atof with a old bsd (V7) one, should be good
> enough to read generated data.
> On Linux it is fast as the system atof, but on Windows this code
> makes importing data the first time usable.
> On Windows i only have timing values from a debug build
> (it seems in release mode DataSource::validSource always fails).
> When importing gyrodata.dat the output with attached patch is (numbers are seconds):
> Linux (-O1):
> AsciiSource::readField: sum = 1.0
> AsciiSource::readField: sum = 4.7
> AsciiSource::readField: sum = 9.0
> Windows (debug build):
> AsciiSource::readField: sum = 2.6
> AsciiSource::readField: sum = 11.7
> AsciiSource::readField: sum = 21.5
I've committed the atof replacement for windows.
Now it loads gyrodata.dat within a second.
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