perf(withLatestFrom): remove tryCatch/errorObject, 92k -> 107k (16% i…

…mprovement)
ReactiveX · Jan 27, 2016 · e4ccb44 · e4ccb44
1 parent 359ccae
commit e4ccb44
Showing 1 changed file with 15 additions and 14 deletions.
diff --git a/src/operator/withLatestFrom.ts b/src/operator/withLatestFrom.ts
@@ -1,8 +1,6 @@
 import {Operator} from '../Operator';
 import {Subscriber} from '../Subscriber';
 import {Observable} from '../Observable';
-import {tryCatch} from '../util/tryCatch';
-import {errorObject} from '../util/errorObject';
 import {OuterSubscriber} from '../OuterSubscriber';
 import {subscribeToResult} from '../util/subscribeToResult';
 
@@ -81,20 +79,23 @@ class WithLatestFromSubscriber<T, R> extends OuterSubscriber<T, R> {
 
  protected _next(value: T) {
  if (this.toRespond.length === 0) {
- const values = this.values;
- const destination = this.destination;
- const project = this.project;
- const args = [value, ...values];
- if (project) {
- let result = tryCatch(this.project).apply(this, args);
- if (result === errorObject) {
- destination.error(result.e);
- } else {
- destination.next(result);
- }
+ const args = [value, ...this.values];
+ if (this.project) {
+ this._tryProject(args);
  } else {
- destination.next(args);
+ this.destination.next(args);
  }
  }
  }
+
+ private _tryProject(args: any[]) {
+ let result: any;
+ try {
+ result = this.project.apply(this, args);
+ } catch (err) {
+ this.destination.error(err);
+ return;
+ }
+ this.destination.next(result);
+ }
 }