Chrome Version       : 59.0.3063.0
OS Version: OS X 10.12.3
URLs (if applicable) : http://codepen.io/juliangarnier/pen/JWVmpR?editors=0011
Other browsers tested:
  Chrome 57: OK
  Safari 10: OK
  Firefox 52: OK

What steps will reproduce the problem?
1. Create a function that use Array.reduce() to process data from 2 Arrays and return the result. 
2. Loop through the function using requestAnimationFrame an log the result.
3. Wait a few seconds, between 10s and 40s.

What is the expected result?
The result of the function is logged every frame, returning the proper Array.reduce() operation result.

What happens instead of that?
Array.reduce() returns undefined or NaN depending of the type of data contained in the Arrays.

Please provide any additional information below. Attach a screenshot if
possible.
Looks like the problem happens more quickly if looped inside a for loop.

The problem can be solved by replacing the native Array.reduce with a polyfill (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce#Polyfill) 


UserAgentString: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3063.0 Safari/537.36



 

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