Add note on displayLabel performance.

angular · Jan 17, 2017 · b78426e · b78426e
1 parent f4a2a01
commit b78426e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/lib/slider/slider.ts b/src/lib/slider/slider.ts
@@ -237,6 +237,9 @@ export class MdSlider implements ControlValueAccessor {
 
   /** The value to be used for display purposes. */
   get displayValue(): string|number {
+    // Note that this could be improved further by rounding something like 0.999 to 0.99 or
+    // 0.899 to 0.89, however it is very performance sensitive, because it gets called on
+    // every change detection cycle.
     if (this._roundLabelTo && this.value % 1 !== 0) {
       return this.value.toFixed(this._roundLabelTo);
     }