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A comment on Why does changing 0.1f to 0 slow down performance by 10x?. Parent comment

Re:Why does changing 0.1f to 0 slow down performance by 10x? by jedbrown on Sunday March 11, 2012 @01:27PM (#3690721)
The conversion is optimized out by gcc-4.6 at all positive optimization levels, the addition is optimized at -O2 and above. But the slowness is caused by the algorithms being different, with one producing denormals while the other stays reasonable.
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