[CM] TeXmacs & S7
elronnd at elronnd.net
Mon Jan 17 12:28:06 PST 2022
Another idea is inline caching...
On Mon, 17 Jan 2022, Elijah Stone wrote:
> On Mon, 17 Jan 2022, bil at 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).
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