skip auditTime if set to 0ms

Author: andrewseguin

src/lib/core/overlay/scroll/scroll-dispatcher.ts

@@ -58,6 +58,12 @@ export class ScrollDispatcher {
    * to override the default "throttle" time.
    */
   scrolled(auditTimeInMs: number = DEFAULT_AUDIT_TIME): Observable<void> {
+    // In the case of a 0ms delay, return the observable without auditTime since it does add
+    // a perceptible delay in processing overhead.
+    if (auditTimeInMs == 0) {
+      return this._scrolled.asObservable();
+    }
+
     return this._scrolled.asObservable().auditTime(auditTimeInMs);
   }
 

src/lib/tooltip/tooltip.ts

@@ -39,7 +39,7 @@ export type TooltipPosition = 'left' | 'right' | 'above' | 'below' | 'before' |
 export const TOUCHEND_HIDE_DELAY  = 1500;
 
 /** Time in ms to throttle repositioning after scroll events. */
-export const SCROLL_THROTTLE_MS = 10;
+export const SCROLL_THROTTLE_MS = 0;
 
 /**
  * Directive that attaches a material design tooltip to the host element. Animates the showing and