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Ran 22 Jul 2018 10:39PM UTC

Files 93

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Committed 22 Jul 2018 10:30PM UTC coverage: 48.005% (+0.09%) from 47.917%

Job # 5023.2

Build Type

Pull #1772

travis-ci

Committed by

web-flow

Commit Message

Tracing overlay: change type of internal `nodes` field to Map

This replaces the data type of the internal node directory from Object
to Map. This enforces proper typing of node IDs when referencing into
the dictionary, which will make ID types more predictable and reduces
other type enforcing code like Object.keys(this.nodes).map(Number).

Iterating maps is in many scenarios faster than itering objects and some
useful helper fields and methods like ".size" are provided. This doesn't
seem to make a big difference though for common node query sizes. For
~20,000 nodes, using the Map implementation saves  about ~20ms in
average. Memory use however is much better with the Map based
implementation. It seems that the Tracing Overlay needs about one third
less memory when using the Map implementation and garbage collection
happens more quickly.

Pull Request Pull Request #1772: Tracing overlay: change type of internal `nodes` field to Map

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