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![]() Some benchmarking for different compilers and levels (seconds): gcc 4.4.7: O0=ICE O1=38.62 O2=58.13 O3=3721.11 gcc 4.5.4: O0=6.21 O1=25.63 O2=38.24 O3=3085.74 gcc 4.6.4: O0=4.95 O1=15.89 O2=32.94 O3=48.95 gcc 4.7.3: O0=6.11 O1=22.03 O2=126.41 O3=348.02 Hans tracked a wrong compile issue in 4.7 to the use of -O0. That table shows that -O1 is acceptable for everybody. Note that it isn't a time critical function, and it doesn't make sense to optimize it much (it's a bunch of calls to another function which itself is optimized and no computations). |
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