Promise then(resolve, reject) vs. then(resolve).catch(reject)

Benchmark created on

Description

This test compares the performance of handling both resolve and reject cases using two different Promise API patterns:

  1. promise.then(resolve, reject) - Passing both handlers to the 'then' method.
  2. promise.then(resolve).catch(reject) - Chaining 'catch' after 'then' for rejection.

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Testing in
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Resolved: then(resolve, reject)
var resolvedPromise = Promise.resolve(1);
resolvedPromise.then(function(value) {
      // Do nothing
    }, function(error) {
      // This should not be called
    });
ready
Resolved: then(resolve).catch(reject)
var resolvedPromise = Promise.resolve(1);
    resolvedPromise.then(function(value) {
      // Do nothing
    }).catch(function(error) {
      // This should not be called
    });
ready
Rejected: then(resolve, reject)
var rejectedPromise = Promise.reject(new Error('Test Error'));

rejectedPromise.then(function(value) {
      // This should not be called
    }, function(error) {
      // Do nothing
    });
ready
Rejected: then(resolve).catch(reject)
 var rejectedPromise = Promise.reject(new Error('Test Error'));
 
 rejectedPromise.then(function(value) {
      // This should not be called
 }).catch(function(error) {
      // Do nothing
 });
ready

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