Lazier sparse bit matrix #53629
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Lazier sparse bit matrix #53629
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The new names are clearer.
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Currently when a row is instantiated in SparseBitMatrix, any missing rows prior to it are also fully instantiated. This patch changes things so that those prior rows are minimally instantiated (with a `None`). This avoids a decent number of allocations in NLL, speeding up several benchmarks by up to 0.5%. The patch also removes two unused methods, `len()` and `iter_enumerated()`.
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Aug 26, 2018
…akis Lazier sparse bit matrix A small NLL win. r? @nikomatsakis
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☀️ Test successful - status-appveyor, status-travis |
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A small NLL win.
r? @nikomatsakis