diff --git a/CHANGELOG.md b/CHANGELOG.md
index 099dd1cb4a9..7e9a3454510 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## [next]
 
 - perf(): Rework constructors to avoid the extra perf cost of current setup [#9891](https://github.com/fabricjs/fabric.js/pull/9891)
+- perf(ObjectGeometry): replace cache key string with array [#9887](https://github.com/fabricjs/fabric.js/pull/9887)
 - docs(): Improve JSDOCs for BlendImage [#9876](https://github.com/fabricjs/fabric.js/pull/9876)
 - fix(Group): Pass down the abort signal from group to objects [#9890](https://github.com/fabricjs/fabric.js/pull/9890)
 - fix(util): restore old composeMatrix code for performances improvement [#9851](https://github.com/fabricjs/fabric.js/pull/9851)
diff --git a/src/benchmarks/transformMatrixKey.mjs b/src/benchmarks/transformMatrixKey.mjs
new file mode 100644
index 00000000000..a3bae78774c
--- /dev/null
+++ b/src/benchmarks/transformMatrixKey.mjs
@@ -0,0 +1,97 @@
+import { FabricObject, Group } from '../../dist/index.mjs';
+
+// Swapping of calcCornerCoords in #9377
+
+// OLD CODE FOR REFERENCE AND IMPLEMENTATION TEST
+
+class OldObject extends FabricObject {
+  transformMatrixKey(skipGroup = false) {
+    const sep = '_';
+    let prefix = '';
+    if (!skipGroup && this.group) {
+      prefix = this.group.transformMatrixKey(skipGroup) + sep;
+    }
+    return (
+      prefix +
+      this.top +
+      sep +
+      this.left +
+      sep +
+      this.scaleX +
+      sep +
+      this.scaleY +
+      sep +
+      this.skewX +
+      sep +
+      this.skewY +
+      sep +
+      this.angle +
+      sep +
+      this.originX +
+      sep +
+      this.originY +
+      sep +
+      this.width +
+      sep +
+      this.height +
+      sep +
+      this.strokeWidth +
+      this.flipX +
+      this.flipY
+    );
+  }
+}
+
+class OldGroup extends Group {
+  transformMatrixKey(skipGroup = false) {
+    return OldObject.prototype.transformMatrixKey.call(this, skipGroup);
+  }
+}
+
+// END OF OLD CODE
+
+const newComplexObject = new FabricObject({ width: 100, height: 100 });
+const newComplexGroup = new Group([newComplexObject]);
+new Group([newComplexGroup]);
+
+const oldComplexObject = new OldObject({ width: 100, height: 100 });
+const oldComplexGroup = new OldGroup([oldComplexObject]);
+new OldGroup([oldComplexGroup]);
+
+const benchmark = (callback) => {
+  const start = Date.now();
+  callback();
+  return Date.now() - start;
+};
+
+const complexNew = benchmark(() => {
+  for (let i = 0; i < 1_000_000; i++) {
+    newComplexObject.transformMatrixKey();
+  }
+});
+
+const complexOld = benchmark(() => {
+  for (let i = 0; i < 1_000_000; i++) {
+    oldComplexObject.transformMatrixKey();
+  }
+});
+
+console.log({ complexOld, complexNew });
+
+const newSimpleObject = new FabricObject({ width: 100, height: 100 });
+
+const oldSimpleObject = new OldObject({ width: 100, height: 100 });
+
+const simpleNew = benchmark(() => {
+  for (let i = 0; i < 1_000_000; i++) {
+    newSimpleObject.transformMatrixKey();
+  }
+});
+
+const simpleOld = benchmark(() => {
+  for (let i = 0; i < 1_000_000; i++) {
+    oldSimpleObject.transformMatrixKey();
+  }
+});
+
+console.log({ simpleOld, simpleNew });
diff --git a/src/shapes/Object/ObjectGeometry.ts b/src/shapes/Object/ObjectGeometry.ts
index fa7e6c0c320..05f2cbabeed 100644
--- a/src/shapes/Object/ObjectGeometry.ts
+++ b/src/shapes/Object/ObjectGeometry.ts
@@ -25,9 +25,10 @@ import type { StaticCanvas } from '../../canvas/StaticCanvas';
 import { ObjectOrigin } from './ObjectOrigin';
 import type { ObjectEvents } from '../../EventTypeDefs';
 import type { ControlProps } from './types/ControlProps';
+import { resolveOrigin } from '../../util/misc/resolveOrigin';
 
 type TMatrixCache = {
-  key: string;
+  key: number[];
   value: TMat2D;
 };
 
@@ -437,40 +438,29 @@ export class ObjectGeometry<EventSpec extends ObjectEvents = ObjectEvents>
     this.aCoords = this.calcACoords();
   }
 
-  transformMatrixKey(skipGroup = false): string {
-    const sep = '_';
-    let prefix = '';
+  transformMatrixKey(skipGroup = false): number[] {
+    let prefix: number[] = [];
     if (!skipGroup && this.group) {
-      prefix = this.group.transformMatrixKey(skipGroup) + sep;
+      prefix = this.group.transformMatrixKey(skipGroup);
     }
-    return (
-      prefix +
-      this.top +
-      sep +
-      this.left +
-      sep +
-      this.scaleX +
-      sep +
-      this.scaleY +
-      sep +
-      this.skewX +
-      sep +
-      this.skewY +
-      sep +
-      this.angle +
-      sep +
-      this.originX +
-      sep +
-      this.originY +
-      sep +
-      this.width +
-      sep +
-      this.height +
-      sep +
-      this.strokeWidth +
-      this.flipX +
-      this.flipY
+    prefix.push(
+      this.top,
+      this.left,
+      this.width,
+      this.height,
+      this.scaleX,
+      this.scaleY,
+      this.angle,
+      this.strokeWidth,
+      this.skewX,
+      this.skewY,
+      +this.flipX,
+      +this.flipY,
+      resolveOrigin(this.originX),
+      resolveOrigin(this.originY)
     );
+
+    return prefix;
   }
 
   /**
@@ -487,7 +477,7 @@ export class ObjectGeometry<EventSpec extends ObjectEvents = ObjectEvents>
     }
     const key = this.transformMatrixKey(skipGroup),
       cache = this.matrixCache;
-    if (cache && cache.key === key) {
+    if (cache && cache.key.every((x, i) => x === key[i])) {
       return cache.value;
     }
     if (this.group) {
diff --git a/test/unit/object_geometry.js b/test/unit/object_geometry.js
index 77b860e8cab..69ee6ab5dae 100644
--- a/test/unit/object_geometry.js
+++ b/test/unit/object_geometry.js
@@ -343,11 +343,11 @@
     var key3 = cObj.transformMatrixKey();
     cObj.width = 5;
     var key4 = cObj.transformMatrixKey();
-    assert.notEqual(key1, key2, 'keys are different');
-    assert.equal(key1, key3, 'keys are equal');
-    assert.notEqual(key4, key2, 'keys are different');
-    assert.notEqual(key4, key1, 'keys are different');
-    assert.notEqual(key4, key3, 'keys are different');
+    assert.notDeepEqual(key1, key2, 'keys are different');
+    assert.deepEqual(key1, key3, 'keys are equal');
+    assert.notDeepEqual(key4, key2, 'keys are different');
+    assert.notDeepEqual(key4, key1, 'keys are different');
+    assert.notDeepEqual(key4, key3, 'keys are different');
   });
 
   QUnit.test('transformMatrixKey depends from originX/originY', function(assert) {
@@ -358,9 +358,9 @@
     var key2 = cObj.transformMatrixKey();
     cObj.originY = 'center';
     var key3 = cObj.transformMatrixKey();
-    assert.notEqual(key1, key2, 'keys are different origins 1');
-    assert.notEqual(key1, key3, 'keys are different origins 2');
-    assert.notEqual(key2, key3, 'keys are different origins 3');
+    assert.notDeepEqual(key1, key2, 'keys are different origins 1');
+    assert.notDeepEqual(key1, key3, 'keys are different origins 2');
+    assert.notDeepEqual(key2, key3, 'keys are different origins 3');
   });
 
   QUnit.test('isOnScreen with object that include canvas', function(assert) {