UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

Steps to reproduce the problem:
1. Open attached the test html file
2. Type "bro" to dynamically add 500 browser string options to datalist
3. After typing "bro", continue typing "wser" to get the suggestion for browser options
4. Notice the browser hangs.
5. Window resolution changes.

What is the expected behavior?
1. Browser should be responsive all the time.
2. Option update should happen in the background by hiding the datalist while updating the options and should be displayed again once the options or loaded.

What went wrong?
This hang doesn't happen when the input element is blurred before adding the 500 options.
The problem occurs only when the options are visible while adding large number of options to the data set.
However, focusing back input or programatically triggering a key stroke is not displaying the option list. 
User needs to manually type in a key stroke to bring the option list to visible state.

Did this work before? No 

Does this work in other browsers? N/A

Chrome version: 58.0.3029.110  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version:
 

Deleted: datalist-chrome-issue.html 792 bytes

datalist-chrome-issue.html 792 bytes View Download