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February 23, 2011 06:37
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StrictMath vs FastMath vs Math
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| Intel Core i7 CPU 860 2.80GHz | |
| Running org.apache.commons.math.util.FastMathTestPerformance | |
| Name StrictMath FastMath Math Runs=10000000 Java 1.6.0_25-ea (1.6.0_25-ea-b01) Java HotSpot(TM) 64-Bit Server VM (20.0-b08) | |
| log 71 1.0 39 0.5555 21 0.2953 | |
| log10 94 1.0 108 1.1466 20 0.2174 | |
| log1p 74 1.0 103 1.3986 76 1.0269 | |
| pow 244 1.0 140 0.5726 238 0.9752 | |
| powII 159 1.0 120 0.7582 149 0.9415 | |
| exp 53 1.0 26 0.4959 39 0.7323 | |
| sin 42 1.0 34 0.8286 35 0.8464 | |
| asin 345 1.0 135 0.3911 347 1.0055 | |
| cos 46 1.0 37 0.8064 34 0.7414 | |
| acos 340 1.0 139 0.4079 354 1.0383 | |
| tan 80 1.0 68 0.8462 51 0.6461 | |
| atan 64 1.0 64 0.9931 66 1.0285 | |
| atan2 103 1.0 95 0.9257 104 1.0069 | |
| hypot 598 1.0 34 0.0573 592 0.9906 | |
| cbrt 95 1.0 67 0.7088 96 1.0151 | |
| sqrt 9 1.0 9 0.9818 9 1.0069 | |
| cosh 84 1.0 60 0.7248 85 1.0221 | |
| sinh 95 1.0 68 0.7159 98 1.0352 | |
| tanh 120 1.0 86 0.7193 117 0.9751 | |
| expm1 66 1.0 66 0.9961 66 1.0102 | |
| abs 1 1.0 5 2.8708 2 1.4429 | |
| Running org.apache.commons.math.util.FastMathTestPerformance | |
| Name StrictMath FastMath Math Runs=10000000 Java 1.7.0-ea (1.7.0-ea-b130) Java HotSpot(TM) 64-Bit Server VM (21.0-b02) | |
| log 66 1.0 39 0.5900 20 0.3102 | |
| log10 86 1.0 107 1.2369 20 0.2415 | |
| log1p 68 1.0 105 1.5388 70 1.0281 | |
| pow 214 1.0 139 0.6499 202 0.9434 | |
| powII 135 1.0 125 0.9273 125 0.9327 | |
| exp 56 1.0 27 0.4892 37 0.6726 | |
| sin 40 1.0 34 0.8710 35 0.8797 | |
| asin 323 1.0 134 0.4164 327 1.0121 | |
| cos 43 1.0 37 0.8695 33 0.7779 | |
| acos 320 1.0 142 0.4439 325 1.0140 | |
| tan 60 1.0 67 1.1187 47 0.7807 | |
| atan 52 1.0 65 1.2566 53 1.0168 | |
| atan2 94 1.0 97 1.0329 93 0.9834 | |
| hypot 576 1.0 33 0.0589 575 0.9971 | |
| cbrt 93 1.0 67 0.7252 94 1.0129 | |
| sqrt 9 1.0 9 1.0103 9 0.9810 | |
| cosh 85 1.0 62 0.7313 86 1.0116 | |
| sinh 96 1.0 67 0.6998 99 1.0296 | |
| tanh 105 1.0 82 0.7823 106 1.0037 | |
| expm1 66 1.0 69 1.0505 70 1.0537 | |
| abs 2 1.0 5 2.5366 2 0.9077 |
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@jmsblah left column of each group is some sort of time (presumably nanoseconds per call); right column is time ratio relative to the leftmost group.