Use sparse arrays instead of maps for pickling #9604
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Make use of the fact that every tree has a unique id, so we can use that as an index into a sparse array.
Temporary fix waiting for proper function type specialization
Avoids lack of boxing due to unspecialized function type
dottybot
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Aug 20, 2020
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test performance please |
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performance test scheduled: 10 job(s) in queue, 1 running. |
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Performance test finished successfully: Visit http://dotty-bench.epfl.ch/9604/ to see the changes. Benchmarks is based on merging with master (f2018f0) |
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Pickling keeps a large map of trees to addresses, which can be seen as a map from Ints (unique ids of trees) to Int (address index) which is fairly dense. We get a more compact representation by switching from a HashMap to a SparseIntArray.