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Compare benchmarks#114

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curiousleo merged 4 commits intointerface-to-performancefrom
compare-benchmarks
Apr 29, 2020
Merged

Compare benchmarks#114
curiousleo merged 4 commits intointerface-to-performancefrom
compare-benchmarks

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@curiousleo curiousleo commented Apr 27, 2020 •
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The idea here is the following: in order to determine the performance impact of any change, the benchmark results need to be compared to some reference result.

  • bench.sh just runs the benchmarks and puts the results in a CSV file named after the current branch and commit.
  • compare.py compares results with a reference file and outputs any significant differences.

The workflow would be to run bench.sh on interface-to-performance once, then use the resulting CSV file as a reference to compare the benchmark results on feature branches against.

Example output of compare.py:

$ ./scripts/compare.py benchmarks-backport-9f3e7f6.csv interface-to-performance-0d51fa4.csv
SLOWER
                              Name  Mean_ref  Mean_res Diff_rel
           pure/uniformR/full/Int8  0.018059  0.029977     -40%
          pure/uniformR/full/Int16  0.019081  0.030798     -38%
          pure/uniformR/full/CChar  0.019026  0.029913     -36%
         pure/uniformR/full/CSChar  0.018037  0.031495     -43%
         pure/uniformR/full/CShort  0.019681  0.031254     -37%
        pure/uniformR/full/CUShort  0.017602  0.026783     -34%
     pure/uniformR/excludeMax/Int8  0.019803  0.030902     -36%
    pure/uniformR/excludeMax/Int16  0.019031  0.031986     -41%
    pure/uniformR/excludeMax/CChar  0.019136  0.031197     -39%
   pure/uniformR/excludeMax/CSChar  0.018025  0.030840     -42%
   pure/uniformR/excludeMax/CShort  0.018187  0.031697     -43%
  pure/uniformR/excludeMax/CUShort  0.017693  0.026705     -34%
    pure/uniformR/includeHalf/Int8  0.019642  0.033753     -42%
   pure/uniformR/includeHalf/Int16  0.018021  0.034185     -47%
   pure/uniformR/includeHalf/CChar  0.018114  0.033438     -46%
  pure/uniformR/includeHalf/CSChar  0.018453  0.034654     -47%
  pure/uniformR/includeHalf/CShort  0.019080  0.033611     -43%
 pure/uniformR/includeHalf/CUShort  0.018539  0.026329     -30%


FASTER
                               Name  Mean_ref  Mean_res Diff_rel
                  pure/random/Float  0.027694  0.000372   7,351%
                 pure/random/Double  0.050627  0.000440  11,417%
                pure/random/Integer  0.042463  0.000372  11,324%
           pure/uniformR/full/Word8  0.018167  0.000026  69,088%
          pure/uniformR/full/Word16  0.017675  0.000026  67,528%
          pure/uniformR/full/Word32  0.027825  0.000027 104,536%
          pure/uniformR/full/Word64  0.051293  0.001532   3,248%
            pure/uniformR/full/Word  0.054110  0.001574   3,338%
           pure/uniformR/full/Int64  0.053720  0.030030      79%
             pure/uniformR/full/Int  0.054235  0.001336   3,961%
            pure/uniformR/full/Char  0.018840  0.000220   8,471%
            pure/uniformR/full/Bool  0.018606  0.000029  63,920%
          pure/uniformR/full/CUChar  0.018277  0.000027  67,643%
           pure/uniformR/full/CUInt  0.028652  0.019249      49%
           pure/uniformR/full/CLong  0.053663  0.029671      81%
          pure/uniformR/full/CULong  0.050913  0.001618   3,047%
        pure/uniformR/full/CPtrdiff  0.056398  0.030656      84%
           pure/uniformR/full/CSize  0.053483  0.001671   3,100%
          pure/uniformR/full/CLLong  0.051786  0.028358      83%
         pure/uniformR/full/CULLong  0.052079  0.001726   2,918%
         pure/uniformR/full/CIntPtr  0.055634  0.029031      92%
        pure/uniformR/full/CUIntPtr  0.057014  0.001635   3,387%
         pure/uniformR/full/CIntMax  0.060248  0.030994      94%
        pure/uniformR/full/CUIntMax  0.056299  0.001664   3,283%
     pure/uniformR/excludeMax/Word8  0.018251  0.000135  13,404%
    pure/uniformR/excludeMax/Word16  0.019688  0.000145  13,449%
    pure/uniformR/excludeMax/Word32  0.032734  0.000166  19,639%
    pure/uniformR/excludeMax/Word64  0.052261  0.001602   3,161%
      pure/uniformR/excludeMax/Word  0.055847  0.001748   3,094%
     pure/uniformR/excludeMax/Int64  0.051712  0.028208      83%
       pure/uniformR/excludeMax/Int  0.049465  0.001446   3,321%
      pure/uniformR/excludeMax/Char  0.017772  0.000163  10,836%
      pure/uniformR/excludeMax/Bool  0.016241  0.000059  27,499%
    pure/uniformR/excludeMax/CUChar  0.018654  0.000139  13,278%
     pure/uniformR/excludeMax/CLong  0.050065  0.030473      64%
    pure/uniformR/excludeMax/CULong  0.047202  0.001598   2,853%
  pure/uniformR/excludeMax/CPtrdiff  0.051724  0.027797      86%
     pure/uniformR/excludeMax/CSize  0.048485  0.001746   2,676%
    pure/uniformR/excludeMax/CLLong  0.051382  0.030359      69%
   pure/uniformR/excludeMax/CULLong  0.051246  0.001687   2,938%
   pure/uniformR/excludeMax/CIntPtr  0.050008  0.029798      68%
  pure/uniformR/excludeMax/CUIntPtr  0.050295  0.001693   2,871%
   pure/uniformR/excludeMax/CIntMax  0.052455  0.030259      73%
  pure/uniformR/excludeMax/CUIntMax  0.047624  0.001704   2,695%
    pure/uniformR/includeHalf/Word8  0.018976  0.000136  13,892%
   pure/uniformR/includeHalf/Word16  0.018292  0.000134  13,599%
   pure/uniformR/includeHalf/Word32  0.030351  0.001090   2,684%
   pure/uniformR/includeHalf/Word64  0.046397  0.002790   1,563%
     pure/uniformR/includeHalf/Word  0.050661  0.002990   1,594%
    pure/uniformR/includeHalf/Int64  0.048155  0.031111      55%
      pure/uniformR/includeHalf/Int  0.050257  0.001745   2,780%
     pure/uniformR/includeHalf/Char  0.019314  0.000162  11,791%
     pure/uniformR/includeHalf/Bool  0.017146  0.000055  31,235%
   pure/uniformR/includeHalf/CUChar  0.017750  0.000144  12,245%
    pure/uniformR/includeHalf/CLong  0.047799  0.031242      53%
   pure/uniformR/includeHalf/CULong  0.046741  0.002857   1,536%
 pure/uniformR/includeHalf/CPtrdiff  0.051961  0.031445      65%
    pure/uniformR/includeHalf/CSize  0.048618  0.002738   1,675%
   pure/uniformR/includeHalf/CLLong  0.051833  0.031628      64%
  pure/uniformR/includeHalf/CULLong  0.048065  0.002786   1,625%
  pure/uniformR/includeHalf/CIntPtr  0.048133  0.033423      44%
 pure/uniformR/includeHalf/CUIntPtr  0.048777  0.002784   1,652%
  pure/uniformR/includeHalf/CIntMax  0.051089  0.031373      63%
 pure/uniformR/includeHalf/CUIntMax  0.048438  0.002866   1,590%
      pure/uniformR/unbounded/Float  0.057696  0.000341  16,836%
     pure/uniformR/unbounded/Double  0.079544  0.000437  18,085%

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idontgetoutmuch commented Apr 28, 2020 •
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I am suprised that some of the benchmarks show a decrease in performance - am I reading this correctly?

The reason I am surprised is that previous benchmarks did not show this

Without Specifying Ranges

|----------|----------------|----------------|----------------------|
| Type     | Cycles/Int 1.1 | Cycles/Int 1.2 | Performance Increase |
|----------|----------------|----------------|----------------------|
| Ints     |           1508 |          30.84 |                 48.9 |
| Word16   |            495 |          30.88 |                 16.0 |
| Floats   |           1036 |          35.11 |                 29.5 |
| CFloats  |           1054 |          33.75 |                 31.2 |
| Doubles  |           1875 |          35.77 |                 52.4 |
| CDoubles |            908 |          33.31 |                 27.3 |
| Integers |           1578 |          33.09 |                 47.7 |
| Bools    |            698 |          36.15 |                 19.3 |
| Chars    |            693 |           57.6 |                 12.0 |
|----------|----------------|----------------|----------------------|

Specifying Ranges

|--------------|----------------|----------------|----------------------|
| Type         | Cycles/Int 1.1 | Cycles/Int 1.2 | Performance Increase |
|--------------|----------------|----------------|----------------------|
| Ints         |            734 |            102 |                  7.2 |
| Word16s      |            748 |            115 |                  6.5 |
| Floats       |           2055 |          35.88 |                 57.3 |
| CFloats      |           1071 |          34.96 |                 30.6 |
| Doubles      |           3050 |          35.89 |                 85.0 |
| CDoubles     |           1112 |          34.87 |                 31.9 |
| Integers     |            534 |            868 |                  0.6 |
| Bools        |            739 |          35.22 |                 21.0 |
| Chars        |            790 |            133 |                  5.9 |
| BIG Integers |         199848 |         103056 |                  1.9 |
|--------------|----------------|----------------|----------------------|

Now that I have looked a bit more closely I can see we weren't testing e.g. Int16 but just Word16

@idontgetoutmuch idontgetoutmuch marked this pull request as ready for review April 28, 2020 12:51
idontgetoutmuch
idontgetoutmuch approved these changes Apr 28, 2020
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Very good tool which prompted my question but that is no reason not to merge

@curiousleo curiousleo merged commit 99990d1 into interface-to-performance Apr 29, 2020
@curiousleo curiousleo deleted the compare-benchmarks branch April 29, 2020 07:43
@curiousleo curiousleo mentioned this pull request Apr 29, 2020
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curiousleo added a commit that referenced this pull request May 13, 2020
@curiousleo
Add script to compare benchmarks (#114)
6269e0b
curiousleo added a commit that referenced this pull request May 13, 2020
@curiousleo
Add script to compare benchmarks (#114)
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lehins pushed a commit that referenced this pull request May 18, 2020
@curiousleo @lehins
Add script to compare benchmarks (#114)
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curiousleo added a commit that referenced this pull request May 19, 2020
@curiousleo
Add script to compare benchmarks (#114)
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