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<?php // Proposal idea of enabling the unrolling in the userland. function measure(string $label, callable $fn): void { $start = hrtime(true); $result = $fn(); $end = hrtime(true); $elapsed = ($end - $start) / 1e9; echo "Sum: {$result}, {$label}: " . number_format($elapsed, 6) . " seconds\n"; } $array = range(1, 1e6); $n = count($array); measure("Normal for loop", function () use ($array, $n) { $sum = 0; for ($i = 0; $i < $n; $i++) { $sum += $array[$i]; } return $sum; }); // Sum: 500000500000, Normal for loop: 0.047172 seconds measure("Manual Unrolled x4", function () use ($array, $n) { $sum = 0; for ($i = 0; $i < $n; $i += 4) { $sum += $array[$i] + $array[$i + 1] + $array[$i + 2] + $array[$i + 3]; } return $sum; }); // Sum: 500000500000, Manual Unrolled x4: 0.042200 seconds measure("Manual Unrolled x8", function () use ($array, $n) { $sum = 0; for ($i = 0; $i < $n; $i += 8) { $sum += $array[$i] + $array[$i + 1] + $array[$i + 2] + $array[$i + 3] + $array[$i + 4] + $array[$i + 5] + $array[$i + 6] + $array[$i + 7]; } return $sum; }); // Sum: 500000500000, Manual Unrolled x8: 0.036472 seconds // Attributed Unroll - this is handled by your modified compiler measure("Attributed Unrolled #[Unroll(4)]", function () use ($array, $n) { $sum = 0; // @TODO: KhaledAlam: Unrolling logic of zend_compile_for( ) // #[Unroll(4)] for ($i = 0; $i < $n; $i++) { $sum += $array[$i]; } return $sum; }); // Sum: 0, Attributed Unrolled #[Unroll(4)]: 0.000002 seconds
Output for 8.4.12
Sum: 500000500000, Normal for loop: 0.013133 seconds Sum: 500000500000, Manual Unrolled x4: 0.005223 seconds Sum: 500000500000, Manual Unrolled x8: 0.004774 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006372 seconds
Output for 8.4.11
Sum: 500000500000, Normal for loop: 0.012194 seconds Sum: 500000500000, Manual Unrolled x4: 0.010559 seconds Sum: 500000500000, Manual Unrolled x8: 0.009055 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.005829 seconds
Output for 8.4.10
Sum: 500000500000, Normal for loop: 0.006024 seconds Sum: 500000500000, Manual Unrolled x4: 0.005467 seconds Sum: 500000500000, Manual Unrolled x8: 0.005820 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006589 seconds
Output for 8.4.9
Sum: 500000500000, Normal for loop: 0.006677 seconds Sum: 500000500000, Manual Unrolled x4: 0.006647 seconds Sum: 500000500000, Manual Unrolled x8: 0.005165 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006329 seconds
Output for 8.4.8
Sum: 500000500000, Normal for loop: 0.006500 seconds Sum: 500000500000, Manual Unrolled x4: 0.005481 seconds Sum: 500000500000, Manual Unrolled x8: 0.005064 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006379 seconds
Output for 8.4.7
Sum: 500000500000, Normal for loop: 0.006338 seconds Sum: 500000500000, Manual Unrolled x4: 0.005862 seconds Sum: 500000500000, Manual Unrolled x8: 0.004977 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006629 seconds
Output for 8.4.6
Sum: 500000500000, Normal for loop: 0.006013 seconds Sum: 500000500000, Manual Unrolled x4: 0.005669 seconds Sum: 500000500000, Manual Unrolled x8: 0.005894 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006095 seconds
Output for 8.4.5
Sum: 500000500000, Normal for loop: 0.006065 seconds Sum: 500000500000, Manual Unrolled x4: 0.005672 seconds Sum: 500000500000, Manual Unrolled x8: 0.005331 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006524 seconds
Output for 8.4.4
Sum: 500000500000, Normal for loop: 0.007219 seconds Sum: 500000500000, Manual Unrolled x4: 0.005541 seconds Sum: 500000500000, Manual Unrolled x8: 0.004851 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006530 seconds
Output for 8.4.3
Sum: 500000500000, Normal for loop: 0.006083 seconds Sum: 500000500000, Manual Unrolled x4: 0.006232 seconds Sum: 500000500000, Manual Unrolled x8: 0.004765 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006384 seconds
Output for 8.4.2
Sum: 500000500000, Normal for loop: 0.006151 seconds Sum: 500000500000, Manual Unrolled x4: 0.006027 seconds Sum: 500000500000, Manual Unrolled x8: 0.005409 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006749 seconds
Output for 8.4.1
Sum: 500000500000, Normal for loop: 0.006250 seconds Sum: 500000500000, Manual Unrolled x4: 0.005932 seconds Sum: 500000500000, Manual Unrolled x8: 0.004845 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006380 seconds
Output for 8.3.25
Sum: 500000500000, Normal for loop: 0.014074 seconds Sum: 500000500000, Manual Unrolled x4: 0.007426 seconds Sum: 500000500000, Manual Unrolled x8: 0.005013 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006668 seconds
Output for 8.3.24
Sum: 500000500000, Normal for loop: 0.006545 seconds Sum: 500000500000, Manual Unrolled x4: 0.006363 seconds Sum: 500000500000, Manual Unrolled x8: 0.008945 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.016321 seconds
Output for 8.3.23
Sum: 500000500000, Normal for loop: 0.006021 seconds Sum: 500000500000, Manual Unrolled x4: 0.005862 seconds Sum: 500000500000, Manual Unrolled x8: 0.005445 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006346 seconds
Output for 8.3.22
Sum: 500000500000, Normal for loop: 0.006190 seconds Sum: 500000500000, Manual Unrolled x4: 0.005568 seconds Sum: 500000500000, Manual Unrolled x8: 0.005068 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006356 seconds
Output for 8.3.21
Sum: 500000500000, Normal for loop: 0.006718 seconds Sum: 500000500000, Manual Unrolled x4: 0.005167 seconds Sum: 500000500000, Manual Unrolled x8: 0.005541 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006731 seconds
Output for 8.3.20
Sum: 500000500000, Normal for loop: 0.006499 seconds Sum: 500000500000, Manual Unrolled x4: 0.006552 seconds Sum: 500000500000, Manual Unrolled x8: 0.005059 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007375 seconds
Output for 8.3.19
Sum: 500000500000, Normal for loop: 0.006495 seconds Sum: 500000500000, Manual Unrolled x4: 0.005687 seconds Sum: 500000500000, Manual Unrolled x8: 0.004928 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006436 seconds
Output for 8.3.18
Sum: 500000500000, Normal for loop: 0.006043 seconds Sum: 500000500000, Manual Unrolled x4: 0.006258 seconds Sum: 500000500000, Manual Unrolled x8: 0.005113 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006202 seconds
Output for 8.3.17
Sum: 500000500000, Normal for loop: 0.006548 seconds Sum: 500000500000, Manual Unrolled x4: 0.005229 seconds Sum: 500000500000, Manual Unrolled x8: 0.004860 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006423 seconds
Output for 8.3.16
Sum: 500000500000, Normal for loop: 0.006442 seconds Sum: 500000500000, Manual Unrolled x4: 0.005250 seconds Sum: 500000500000, Manual Unrolled x8: 0.005236 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007131 seconds
Output for 8.3.15
Sum: 500000500000, Normal for loop: 0.006645 seconds Sum: 500000500000, Manual Unrolled x4: 0.006037 seconds Sum: 500000500000, Manual Unrolled x8: 0.004924 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006661 seconds
Output for 8.3.14
Sum: 500000500000, Normal for loop: 0.006776 seconds Sum: 500000500000, Manual Unrolled x4: 0.005846 seconds Sum: 500000500000, Manual Unrolled x8: 0.005280 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007219 seconds
Output for 8.3.13
Sum: 500000500000, Normal for loop: 0.006671 seconds Sum: 500000500000, Manual Unrolled x4: 0.005920 seconds Sum: 500000500000, Manual Unrolled x8: 0.005145 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006703 seconds
Output for 8.3.12
Sum: 500000500000, Normal for loop: 0.007006 seconds Sum: 500000500000, Manual Unrolled x4: 0.005333 seconds Sum: 500000500000, Manual Unrolled x8: 0.005132 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006641 seconds
Output for 8.3.11
Sum: 500000500000, Normal for loop: 0.006181 seconds Sum: 500000500000, Manual Unrolled x4: 0.006090 seconds Sum: 500000500000, Manual Unrolled x8: 0.005450 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006074 seconds
Output for 8.3.10
Sum: 500000500000, Normal for loop: 0.006055 seconds Sum: 500000500000, Manual Unrolled x4: 0.005063 seconds Sum: 500000500000, Manual Unrolled x8: 0.005221 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007133 seconds
Output for 8.3.9
Sum: 500000500000, Normal for loop: 0.006707 seconds Sum: 500000500000, Manual Unrolled x4: 0.006111 seconds Sum: 500000500000, Manual Unrolled x8: 0.004962 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007881 seconds
Output for 8.3.8
Sum: 500000500000, Normal for loop: 0.010158 seconds Sum: 500000500000, Manual Unrolled x4: 0.006302 seconds Sum: 500000500000, Manual Unrolled x8: 0.005787 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006122 seconds
Output for 8.3.7
Sum: 500000500000, Normal for loop: 0.006890 seconds Sum: 500000500000, Manual Unrolled x4: 0.005791 seconds Sum: 500000500000, Manual Unrolled x8: 0.005881 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007350 seconds
Output for 8.3.6
Sum: 500000500000, Normal for loop: 0.008930 seconds Sum: 500000500000, Manual Unrolled x4: 0.007046 seconds Sum: 500000500000, Manual Unrolled x8: 0.005684 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006496 seconds
Output for 8.3.5
Sum: 500000500000, Normal for loop: 0.006268 seconds Sum: 500000500000, Manual Unrolled x4: 0.005384 seconds Sum: 500000500000, Manual Unrolled x8: 0.005428 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006302 seconds
Output for 8.3.4
Sum: 500000500000, Normal for loop: 0.007251 seconds Sum: 500000500000, Manual Unrolled x4: 0.008177 seconds Sum: 500000500000, Manual Unrolled x8: 0.006818 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006520 seconds
Output for 8.3.3
Sum: 500000500000, Normal for loop: 0.006100 seconds Sum: 500000500000, Manual Unrolled x4: 0.005868 seconds Sum: 500000500000, Manual Unrolled x8: 0.005702 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006297 seconds
Output for 8.3.2
Sum: 500000500000, Normal for loop: 0.007260 seconds Sum: 500000500000, Manual Unrolled x4: 0.008026 seconds Sum: 500000500000, Manual Unrolled x8: 0.004919 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.008309 seconds
Output for 8.3.1
Sum: 500000500000, Normal for loop: 0.006983 seconds Sum: 500000500000, Manual Unrolled x4: 0.005619 seconds Sum: 500000500000, Manual Unrolled x8: 0.005058 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007000 seconds
Output for 8.3.0
Sum: 500000500000, Normal for loop: 0.006663 seconds Sum: 500000500000, Manual Unrolled x4: 0.005481 seconds Sum: 500000500000, Manual Unrolled x8: 0.004841 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006617 seconds
Output for 8.2.29
Sum: 500000500000, Normal for loop: 0.010188 seconds Sum: 500000500000, Manual Unrolled x4: 0.006580 seconds Sum: 500000500000, Manual Unrolled x8: 0.005061 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006707 seconds
Output for 8.2.28
Sum: 500000500000, Normal for loop: 0.006318 seconds Sum: 500000500000, Manual Unrolled x4: 0.005140 seconds Sum: 500000500000, Manual Unrolled x8: 0.005048 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007103 seconds
Output for 8.2.27
Sum: 500000500000, Normal for loop: 0.006121 seconds Sum: 500000500000, Manual Unrolled x4: 0.006200 seconds Sum: 500000500000, Manual Unrolled x8: 0.005117 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006201 seconds
Output for 8.2.26
Sum: 500000500000, Normal for loop: 0.006999 seconds Sum: 500000500000, Manual Unrolled x4: 0.005320 seconds Sum: 500000500000, Manual Unrolled x8: 0.004833 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006184 seconds
Output for 8.2.25
Sum: 500000500000, Normal for loop: 0.006918 seconds Sum: 500000500000, Manual Unrolled x4: 0.005243 seconds Sum: 500000500000, Manual Unrolled x8: 0.004868 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006009 seconds
Output for 8.2.24
Sum: 500000500000, Normal for loop: 0.006204 seconds Sum: 500000500000, Manual Unrolled x4: 0.005413 seconds Sum: 500000500000, Manual Unrolled x8: 0.005785 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006512 seconds
Output for 8.2.23
Sum: 500000500000, Normal for loop: 0.007054 seconds Sum: 500000500000, Manual Unrolled x4: 0.005562 seconds Sum: 500000500000, Manual Unrolled x8: 0.005203 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006924 seconds
Output for 8.2.22
Sum: 500000500000, Normal for loop: 0.006327 seconds Sum: 500000500000, Manual Unrolled x4: 0.006127 seconds Sum: 500000500000, Manual Unrolled x8: 0.005276 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006000 seconds
Output for 8.2.21
Sum: 500000500000, Normal for loop: 0.007045 seconds Sum: 500000500000, Manual Unrolled x4: 0.005625 seconds Sum: 500000500000, Manual Unrolled x8: 0.005268 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006578 seconds
Output for 8.2.20
Sum: 500000500000, Normal for loop: 0.006444 seconds Sum: 500000500000, Manual Unrolled x4: 0.005744 seconds Sum: 500000500000, Manual Unrolled x8: 0.004876 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007116 seconds
Output for 8.2.19
Sum: 500000500000, Normal for loop: 0.005983 seconds Sum: 500000500000, Manual Unrolled x4: 0.005684 seconds Sum: 500000500000, Manual Unrolled x8: 0.005318 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006303 seconds
Output for 8.2.18
Sum: 500000500000, Normal for loop: 0.006451 seconds Sum: 500000500000, Manual Unrolled x4: 0.005488 seconds Sum: 500000500000, Manual Unrolled x8: 0.005187 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006443 seconds
Output for 8.2.17
Sum: 500000500000, Normal for loop: 0.006193 seconds Sum: 500000500000, Manual Unrolled x4: 0.005183 seconds Sum: 500000500000, Manual Unrolled x8: 0.005002 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007048 seconds
Output for 8.2.16
Sum: 500000500000, Normal for loop: 0.007230 seconds Sum: 500000500000, Manual Unrolled x4: 0.005218 seconds Sum: 500000500000, Manual Unrolled x8: 0.004883 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007297 seconds
Output for 8.2.15
Sum: 500000500000, Normal for loop: 0.006113 seconds Sum: 500000500000, Manual Unrolled x4: 0.005449 seconds Sum: 500000500000, Manual Unrolled x8: 0.005175 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006342 seconds
Output for 8.2.14
Sum: 500000500000, Normal for loop: 0.006663 seconds Sum: 500000500000, Manual Unrolled x4: 0.005343 seconds Sum: 500000500000, Manual Unrolled x8: 0.006219 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006143 seconds
Output for 8.2.13
Sum: 500000500000, Normal for loop: 0.007563 seconds Sum: 500000500000, Manual Unrolled x4: 0.005323 seconds Sum: 500000500000, Manual Unrolled x8: 0.004977 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006524 seconds
Output for 8.2.12
Sum: 500000500000, Normal for loop: 0.006201 seconds Sum: 500000500000, Manual Unrolled x4: 0.006405 seconds Sum: 500000500000, Manual Unrolled x8: 0.005440 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006663 seconds
Output for 8.2.11
Sum: 500000500000, Normal for loop: 0.006383 seconds Sum: 500000500000, Manual Unrolled x4: 0.005207 seconds Sum: 500000500000, Manual Unrolled x8: 0.006016 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006271 seconds
Output for 8.2.10
Sum: 500000500000, Normal for loop: 0.007157 seconds Sum: 500000500000, Manual Unrolled x4: 0.007096 seconds Sum: 500000500000, Manual Unrolled x8: 0.006815 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006390 seconds
Output for 8.2.9
Sum: 500000500000, Normal for loop: 0.006960 seconds Sum: 500000500000, Manual Unrolled x4: 0.007652 seconds Sum: 500000500000, Manual Unrolled x8: 0.005867 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007142 seconds
Output for 8.2.8
Sum: 500000500000, Normal for loop: 0.006333 seconds Sum: 500000500000, Manual Unrolled x4: 0.005153 seconds Sum: 500000500000, Manual Unrolled x8: 0.005474 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007015 seconds
Output for 8.2.7
Sum: 500000500000, Normal for loop: 0.007366 seconds Sum: 500000500000, Manual Unrolled x4: 0.005286 seconds Sum: 500000500000, Manual Unrolled x8: 0.005395 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007095 seconds
Output for 8.2.6
Sum: 500000500000, Normal for loop: 0.006315 seconds Sum: 500000500000, Manual Unrolled x4: 0.005555 seconds Sum: 500000500000, Manual Unrolled x8: 0.006103 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.007007 seconds
Output for 8.2.5
Sum: 500000500000, Normal for loop: 0.005996 seconds Sum: 500000500000, Manual Unrolled x4: 0.005097 seconds Sum: 500000500000, Manual Unrolled x8: 0.004742 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006146 seconds
Output for 8.2.4
Sum: 500000500000, Normal for loop: 0.011272 seconds Sum: 500000500000, Manual Unrolled x4: 0.009354 seconds Sum: 500000500000, Manual Unrolled x8: 0.008418 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.011362 seconds
Output for 8.2.3
Sum: 500000500000, Normal for loop: 0.010587 seconds Sum: 500000500000, Manual Unrolled x4: 0.009321 seconds Sum: 500000500000, Manual Unrolled x8: 0.009276 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.013541 seconds
Output for 8.2.2
Sum: 500000500000, Normal for loop: 0.005976 seconds Sum: 500000500000, Manual Unrolled x4: 0.005098 seconds Sum: 500000500000, Manual Unrolled x8: 0.004925 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006163 seconds
Output for 8.2.1
Sum: 500000500000, Normal for loop: 0.005910 seconds Sum: 500000500000, Manual Unrolled x4: 0.005095 seconds Sum: 500000500000, Manual Unrolled x8: 0.004745 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006114 seconds
Output for 8.2.0
Sum: 500000500000, Normal for loop: 0.006278 seconds Sum: 500000500000, Manual Unrolled x4: 0.005234 seconds Sum: 500000500000, Manual Unrolled x8: 0.004755 seconds Sum: 500000500000, Attributed Unrolled #[Unroll(4)]: 0.006415 seconds
preferences:
49.64 ms | 520 KiB | 5 Q