On Tuesday, 31 May 2016 at 08:43:59 UTC, Chris wrote:
On Monday, 30 May 2016 at 22:16:27 UTC, qznc wrote:
And Desktop:
./benchmark.ldc
std: 129 ±24 +40 (3121) -17 (6767)
manual: 129 ±31 +59 (2668) -21 (7244)
qznc: 112 ±14 +30 (2542) -9 (7312)
Chris: 134 ±33 +58 (2835) -23 (7068)
Andrei: 123 ±27 +53 (2679) -18 (7225)
(avg slowdown vs fastest; absolute deviation)
CPU ID: GenuineIntel Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
./benchmark.dmd
std: 157 ±31 +44 (3693) -24 (6234)
manual: 143 ±41 +73 (2854) -28 (7091)
qznc: 116 ±21 +35 (3092) -14 (6844)
Chris: 181 ±50 +74 (3452) -38 (6510)
Andrei: 136 ±38 +64 (2975) -27 (6953)
(avg slowdown vs fastest; absolute deviation)
CPU ID: GenuineIntel Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
Benchmark from desktop machine:
DMD:
std: 164 ±34 +43 (4054) -29 (5793)
manual: 150 ±41 +72 (2889) -29 (7032)
qznc: 103 ±6 +42 ( 878) -2 (9090)
Chris: 205 ±43 +81 (2708) -29 (7232)
Andrei: 136 ±31 +53 (2948) -22 (6977)
(avg slowdown vs fastest; absolute deviation)
CPU ID: GenuineIntel Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz
===
LDC:
std: 138 ±23 +35 (3457) -18 (6360)
manual: 145 ±33 +45 (3748) -27 (6181)
qznc: 105 ±7 +17 (2267) -4 (7534)
Chris: 135 ±33 +56 (3061) -23 (6882)
Andrei: 121 ±27 +52 (2630) -18 (7301)
(avg slowdown vs fastest; absolute deviation)
CPU ID: GenuineIntel Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz
On my laptop Andrei's was the fasted (see post above).
Comparing the chips involved, could it be cache related?
3M cache; Andrei wins both:
http://ark.intel.com/products/75459/Intel-Core-i5-4200U-Processor-3M-Cache-up-to-2_60-GHz
4M cache; qznc wins DMD (and is faster than the LDC's best?
What?); Andrei wins LDC:
http://ark.intel.com/products/43560/Intel-Core-i7-620M-Processor-4M-Cache-2_66-GHz
8M cache; qznc wins both:
http://ark.intel.com/products/65719/Intel-Core-i7-3770-Processor-8M-Cache-up-to-3_90-GHz
http://ark.intel.com/products/75122/Intel-Core-i7-4770-Processor-8M-Cache-up-to-3_90-GHz
Normally, I'd expect the 4200U to be similar to the desktop
parts. Unless...
Say, for the laptops (and I guess the desktops too, but it's more
important in a mobile), did you verify the CPU frequency scaling
wasn't interfering?
-Wyatt
