jade
272db8af1b
This does not add missing release notes, and it doesn't do anything
about the profiles feature we would really like to have so we can have
consistent credit.
Change-Id: I72a6f7acfcff85f380be17dac76501a6f4693776
442 B
442 B
| synopsis | prs | category | credits |
|---|---|---|---|
| `inherit (x) ...` evaluates `x` only once | 9847 | Fixes | horrors |
inherit (x) a b ... now evaluates the expression x only once for all inherited attributes rather than once for each inherited attribute.
This does not usually have a measurable impact, but side-effects (such as builtins.trace) would be duplicated and expensive expressions (such as derivations) could cause a measurable slowdown.