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base repository: amaranth-lang/amaranth
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Commits on Sep 27, 2021

  1. hdl.ast: remove quadratic time complexity in Statement.cast(). 

    Using `sum(lst, [])` to flatten a list of lists has quadratic time
complexity. Use `chain.from_iterable()` instead. While not strictly
necessary to improve performance, convert to `map()`.

A test case writing out verilog for a 512k entry FIFO is 120x faster
with this applied.
    @antonblanchard
    antonblanchard committed Sep 27, 2021
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