Index PropertyKey, Object iterators and symbol support
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HalidOdat
added
enhancement
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@@ Coverage Diff @@
## master #603 +/- ##
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- Coverage 72.91% 72.49% -0.43%
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Files 178 179 +1
Lines 13226 13367 +141
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+ Hits 9644 9690 +46
- Misses 3582 3677 +95
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HalidOdat
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PropertyKey and Object iteratorsPropertyKey, Object iterators and symbol support
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This is ready for review! :) Hmmm. The benchmarks are not showing the correct results! I did a local benchmark and there was a very small regression in 3 benchmarks (+5%) that is because we did not account for Symbols at all before. but the majority have a What do you think? @Razican |
Thanks! I will give this a look as soon as I can :)
Yep, we have to take the benchmarks with a grain of salt. I would say that if multiple benchmarks are showing the same, (which might be the case here), it might be because this is regressing in the particular case of the GitHub actions instance configuration. I will run the benchmarks locally just to make sure that there isn't something we are missing. In any case, I think it's fine to have some performance regressions when we add new stuff. I expect some performance regressions when we implement things such as async/await. |
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Lan2u
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Aug 18, 2020
Lan2u
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Aug 18, 2020
Razican
reviewed
Aug 19, 2020
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It changes the following:
itermethod to object to iterate over all (indexed, string and symbol) keys (PropertyKey) and value (Property)keysmethod to object to iterate over all (indexed, string and symbol) keys (PropertyKey)valuesmethod to object to iterate through all the (indexed, string and symbol) values (Property).symbol_propertiesmethod to object to iterate over symbol keys (RcSymbol) and value (Property)symbol_property_keysmethod to object to iterate over symbol keys (RcSymbol)symbol_property_valuesmethod to object to iterate over symbol values (Property)index_propertiesmethod to object to iterate over index keys (u32) and value (Property)index_property_keysmethod to object to iterate over index keys (u32)index_property_valuesmethod to object to iterate over index values (Property)string_propertiesmethod to object to iterate over string keys (RcString) and value (Property)string_property_keysmethod to object to iterate over string keys (RcString)string_property_valuesmethod to object to iterate over string values (Property)properties,properties_mut,symbol_propertiesandsymbol_properties_mut.Symbolindexing support..construct_symbol()for creating symbols.construct_object()for creating object with the prototype set.PropertyKey::Index(u32)This is done for a couple of reasons:u32and not asRcStrings (memory optimization)u32instead ofRcStrings).get_field(i.to_string())instead we should do.get_field(i)indexed_propertiesHash map with keyu32this is because an array index is from0to2^32 - 1(u32::MAX).IndexMapand when we need to iterate through all the elements (in order) we can do so without iteration through0tolength(this is what caused the test runner to freeze in Add ECMAScript test suite (test262) #567 withindexOfwith sparse elements). should make iteration very fast.RcString.Objectsymbol_propertiescontain keyRcSymbolinstead of just hash:Symboldescriptionwe need the symbol:Symbol.toPrimitive.description