Reduce allocations in TransformArrayInitializers #2731
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DecodeArrayInitializer - Instead of relying on the Add method of a list to expand the underlying array when necessary, the code now allocates a big enough array to fit all the elements removing the need for the Add method to expand the array several times. BlockFromInitializer now reuses a single instance of List<ILInstruction> instead of reallocating a new one every time and clears it when necessary. The same pre-allocation approach mentioned above has been implemented here too.
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Link to issue(s) this covers
N/A
Problem
The TransformArrayInitializers allocates a lot of unnecessary arrays.
Solution
DecodeArrayInitializer- Instead of relying on the Add method of a list to expand the underlying array when necessary, the code now allocates a big enough array to fit all the elements removing the need for the Add method to expand the array several times.BlockFromInitializernow reuses a single instance of List instead of reallocating a new one every time and clears it when necessary. The same pre-allocation approach mentioned above has been implemented here too.