Hi, On 2023-07-25 08:50:19 -0700, Andres Freund wrote: > One idea I had was to add a fastpath that won't parse all strings, but will > parse the strings that we would generate, and fall back to the more general > variant if it fails. See the attached, rough, prototype: > > fix_COPY_DEFAULT.patch + fastpath.patch: > 746.971 > > fix_COPY_DEFAULT.patch + fastpath.patch + isdigit.patch: > 715.570 > > Now, the precise contents of this fastpath are not yet clear (wrt imul or > not), but I think the idea has promise.
Btw, I strongly suspect that fastpath wants to be branchless SSE when it grows up. Greetings, Andres Freund
