Shrink ValueSymbolLinks by 16 bytes (#64739)

Author: ahejlsberg

tsc/internal/checker/checker.go

@@ -647,6 +647,7 @@ type Checker struct {
 	iterationTypesCache                         map[IterationTypesKey]IterationTypes
 	markerTypes                                 collections.Set[*Type]
 	resolvingExplicitTypeOfSymbol               collections.Set[*ast.Symbol]
+	constructorOrFunctionChecked                collections.Set[*ast.Symbol]
 	undefinedSymbol                             *ast.Symbol
 	argumentsSymbol                             *ast.Symbol
 	requireSymbol                               *ast.Symbol
@@ -3492,8 +3493,7 @@ func (c *Checker) checkFunctionOrMethodDeclaration(node *ast.Node) {
 
 func (c *Checker) checkFunctionOrConstructorSymbol(symbol *ast.Symbol) {
 	// Only check the symbol once
-	if links := c.valueSymbolLinks.Get(symbol); !links.functionOrConstructorChecked {
-		links.functionOrConstructorChecked = true
+	if c.constructorOrFunctionChecked.AddIfAbsent(symbol) {
 		c.checkFunctionOrConstructorSymbolWorker(symbol)
 	}
 }

tsc/internal/checker/types.go

@@ -180,13 +180,12 @@ type SymbolReferenceLinks struct {
 // Links for value symbols
 
 type ValueSymbolLinks struct {
-	resolvedType                 *Type // Type of value symbol
-	writeType                    *Type
-	target                       *ast.Symbol
-	mapper                       *TypeMapper
-	nameType                     *Type
-	containingType               *Type // Mapped type for mapped type property, containing union or intersection type for synthetic property
-	functionOrConstructorChecked bool
+	resolvedType   *Type // Type of value symbol
+	writeType      *Type
+	target         *ast.Symbol
+	mapper         *TypeMapper
+	nameType       *Type
+	containingType *Type // Mapped type for mapped type property, containing union or intersection type for synthetic property
 }
 
 // Additional links for mapped symbols