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assert: improve deep equal map #14501

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assert: improve deep equal map #14501

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3fda942
assert: optimize code path for deepEqual Maps
BridgeAR Jul 26, 2017
b515624
assert: remove and improve a few comments
BridgeAR Jul 26, 2017
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assert: remove and improve a few comments
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@BridgeAR
BridgeAR committed Jul 26, 2017
commit b5156242501531028f183d999197b9b709fcfa36
8 changes: 1 addition & 7 deletions lib/assert.js
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Expand Up @@ -353,10 +353,6 @@ function setEquiv(a, b, strict, memo) {
// This is a lazily initiated Set of entries which have to be compared
// pairwise.
var set = null;
// When the sets contain only value types (eg, lots of numbers), and we're in
// strict mode or if all entries strictly match, we don't need to match the
// entries in a pairwise way. In that case this initialization is done lazily
// to avoid the allocation & bookkeeping cost.
for (const val of a) {
// Note: Checking for the objects first improves the performance for object
// heavy sets but it is a minor slow down for primitives. As they are fast
Expand All @@ -377,7 +373,7 @@ function setEquiv(a, b, strict, memo) {

if (set !== null) {
for (const val of b) {
// In non-strict-mode we have to check if a primitive value is already
// We have to check if a primitive value is already
// matching and only if it's not, go hunting for it.
if (typeof val === 'object' && val !== null) {
if (!setHasEqualElement(set, val, strict, memo))
Expand Down Expand Up @@ -479,8 +475,6 @@ function mapHasEqualEntry(set, map, key1, item1, strict, memo) {
}

function mapEquiv(a, b, strict, memo) {
// Caveat: In non-strict mode, this implementation does not handle cases
// where maps contain two equivalent-but-not-reference-equal keys.
if (a.size !== b.size)
return false;

Expand Down