Chronicle Map 3.9.1 Performance Improvements

[Roman Leventov]

In Chronicle Map 3.9.1 performance was improved significantly, especially of ChronicleMap.get() and getUsing() methods. Improvements are achieved not by updating Chronicle Map's off-heap structure, it wasn't changed at all. Improvements are achieved by doing less unnecessary "Java on-heap work" around the off-heap data structure.

Here are benchmark results of running successful map.get() on a Map with IntValue key and IntValue (i. e. with minimum possible key and value serialization/deserialization costs):

# of keys   avg time of map.get(), ns/op

in a map    Chronicle Map version

            3.9.1     3.9.0

100         85        535

10k         93        553

1m          208       676

100m        330       860

You could see that inherent map.get() latency reduced by ~ 450 ns.

[Peter Lawrey]

That's a fantastic improvement. Excellent.

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[Francesco Nigro]

Awesome!