Another idea is inline caching...
On Mon, 17 Jan 2022, Elijah Stone wrote:
On Mon, 17 Jan 2022, b...@ccrma.stanford.edu wrote:
Currently, s7's optimizer sometimes depends on the position of the
variables in environments, so your change is only safe if the optimizer
gives up. Since the order matters, a hash-table lookup is unlikely to work
without some serious overhead. Most environments have only a handful of
locals, and a small linear search is faster than a hash-table lookup (and
the search is unnecessary if the variables have unique names).
Why not maintain a hash table whose values are offsets into the flat
environment? Then it's a cheap branch or two on lookup to see: 1) is there a
hash table; 2) should I build one (is the env big enough, and have there been
enough lookups).
-E
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