52 lines
684 B
Markdown
52 lines
684 B
Markdown
# speci.js - specialization benchmark test
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Tests two-property objects with {x, y} or {y, x} and access in a tight loop
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When the array contains consistent elements it optimizes well, but the first
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run is much slower on a randomly mixed array.
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Subsequent runs come up much faster as the higher-tier compilers in V8 can
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handle a couple of different variants -- but this might not be true of all
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possibilities. 256 randomized variants is linearly slower.
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```
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% node speci.js
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** x_first
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run 1
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72 ms
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run 2
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15 ms
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run 3
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22 ms
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** y_first
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run 1
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73 ms
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run 2
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23 ms
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run 3
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20 ms
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** mixed
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run 1
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2766 ms
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run 2
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52 ms
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run 3
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53 ms
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** randomized
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run 1
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464 ms
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run 2
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445 ms
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run 3
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445 ms
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```
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