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optimize: short-circuit update (//)

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imxyy_soope_
2026-02-19 21:54:49 +08:00
parent 4380fa85c4
commit b57fea3104
1 changed files with 6 additions and 0 deletions
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6
nix-js/runtime-ts/src/operators.ts
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@@ -270,6 +270,12 @@ export const op = {
update: (a: NixValue, b: NixValue): NixAttrs => { update: (a: NixValue, b: NixValue): NixAttrs => {
const mapA = forceAttrs(a); const mapA = forceAttrs(a);
const mapB = forceAttrs(b); const mapB = forceAttrs(b);
if (mapA.size === 0) {
return mapB;
}
if (mapB.size === 0) {
return mapA;
}
const result: NixAttrs = new Map(mapA); const result: NixAttrs = new Map(mapA);
for (const [k, v] of mapB) { for (const [k, v] of mapB) {
result.set(k, v); result.set(k, v);