perf: use append instead of Concat in appendLookupLocations (microsoft#632)

Author: MarshallOfSound

internal/compiler/module/cache.go

@@ -1,7 +1,6 @@
 package module
 
 import (
-	"slices"
 	"strings"
 	"sync"
 
@@ -96,9 +95,9 @@ func (c *resolutionCache[T]) appendLookupLocations(resolved T, failedLookupLocat
 	c.mu.Lock()
 	defer c.mu.Unlock()
 	lookupLocations := c.lookupLocations[resolved]
-	lookupLocations.FailedLookupLocations = slices.Concat(lookupLocations.FailedLookupLocations, failedLookupLocations)
-	lookupLocations.AffectingLocations = slices.Concat(lookupLocations.AffectingLocations, affectingLocations)
-	lookupLocations.ResolutionDiagnostics = slices.Concat(lookupLocations.ResolutionDiagnostics, resolutionDiagnostics)
+	lookupLocations.FailedLookupLocations = append(lookupLocations.FailedLookupLocations, failedLookupLocations...)
+	lookupLocations.AffectingLocations = append(lookupLocations.AffectingLocations, affectingLocations...)
+	lookupLocations.ResolutionDiagnostics = append(lookupLocations.ResolutionDiagnostics, resolutionDiagnostics...)
 }
 
 type perDirectoryResolutionCache[T any] struct {