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What do the x and y axises mean on the performance graphs? #1

pachonk opened this Issue Apr 1, 2018 · 2 comments


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pachonk commented Apr 1, 2018

The performance is shown as faster, but what are the x and y axises? Are they the total count mapped over and a unit of time?


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zwilias commented Apr 1, 2018

ilias [10:15 PM]
Horizontal is the size of the list, vertical is the number of list-items processed per second.
For very small lists, things like the overhead of calling a function dominate. When you go a little further along, things tend to settle a bit. Eventually, garbage collection needs to kick in every now and then because foldr and map tend to create intermediate structures and as the sizes grow, so does the generated garbage.

Note that both axes are logarithmic. This makes the plots a little harder to interpret, but it looked prettied. So for example for List.foldr with a List with 10.000 entries, this means that the "next implementation in elm-lang/core" (next, the yellow line) is able to process ~3.000 elements per second, while the implementation in this repo manages ~30.000 elements per second.


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pachonk commented Apr 1, 2018

@zwilias zwilias closed this Apr 2, 2018

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