From a6a2f2f01bb36380bb38204e5246fc47337ce78b Mon Sep 17 00:00:00 2001
From: Evan Wallace <evan.exe@gmail.com>
Date: Wed, 18 Jan 2023 13:32:27 -0500
Subject: [PATCH] reduce hash collisions for css vars

---
 internal/css_ast/css_ast.go | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/internal/css_ast/css_ast.go b/internal/css_ast/css_ast.go
index 11f33e6e38c..773ae093b08 100644
--- a/internal/css_ast/css_ast.go
+++ b/internal/css_ast/css_ast.go
@@ -476,8 +476,22 @@ func (a *RDeclaration) Equal(rule R) bool {
 }
 
 func (r *RDeclaration) Hash() (uint32, bool) {
-	hash := uint32(7)
-	hash = helpers.HashCombine(hash, uint32(r.Key))
+	var hash uint32
+	if r.Key == DUnknown {
+		if r.Important {
+			hash = uint32(7)
+		} else {
+			hash = uint32(8)
+		}
+		hash = helpers.HashCombineString(hash, r.KeyText)
+	} else {
+		if r.Important {
+			hash = uint32(9)
+		} else {
+			hash = uint32(10)
+		}
+		hash = helpers.HashCombine(hash, uint32(r.Key))
+	}
 	hash = HashTokens(hash, r.Value)
 	return hash, true
 }
@@ -492,7 +506,7 @@ func (a *RBadDeclaration) Equal(rule R) bool {
 }
 
 func (r *RBadDeclaration) Hash() (uint32, bool) {
-	hash := uint32(8)
+	hash := uint32(11)
 	hash = HashTokens(hash, r.Tokens)
 	return hash, true
 }
@@ -507,7 +521,7 @@ func (a *RComment) Equal(rule R) bool {
 }
 
 func (r *RComment) Hash() (uint32, bool) {
-	hash := uint32(9)
+	hash := uint32(12)
 	hash = helpers.HashCombineString(hash, r.Text)
 	return hash, true
 }
@@ -538,7 +552,7 @@ func (a *RAtLayer) Equal(rule R) bool {
 }
 
 func (r *RAtLayer) Hash() (uint32, bool) {
-	hash := uint32(10)
+	hash := uint32(13)
 	hash = helpers.HashCombine(hash, uint32(len(r.Names)))
 	for _, parts := range r.Names {
 		hash = helpers.HashCombine(hash, uint32(len(parts)))