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Chris Tate
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A program that declares a class reads and writes untyped properties through helpers that first select the receiver's property bag. The bag helpers return jsvals, so the helpers read the bag through js.toDyn; keyed helpers test each class's key table between the key's coercion and the read; and a program with subclasses normalizes the receiver (value = %dyn.class.normalize(value)) at the start of each helper. The inline-cache recognizer accepted none of these forms, so every property site in such a program called its helper. It now looks through dyn/jsval conversions of the receiver, accepts capsule branches before a keyed helper's final read, and accepts a rebinding of the receiver to a bag of itself. Plain objects and arrays then read and write through the site's cache, as they do in programs without classes. bench/dynamic-properties (new) exercises these sites.
7 lines
81 B
JSON
7 lines
81 B
JSON
{
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"entry": "workloads/dynamic-properties.mjs",
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"args": [
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"1000000"
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]
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}
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