Chrome HAR File size limitation

Question

Environment

• Windows 10
• Chrome Version 66.0.3359.181 (Official Build) (64-bit)

Problem at hand

For debugging purpose, I log network traffic and save it as a HAR file. When the resulting HAR file is large ( > ~12Mb ) it's content is truncated, resulting an Invalid JSON object.

• Might I be doing something wrong?
• Is this a known issue?
• Anyone has encountered something similar in the past ?

Answer 1

This may not be the solution for everyone, but I've just checked that Opera v56 allows HAR file that contains a JSON object that is 1.1MB.

Chrome and Firefox both truncated the same JSON data object.

However that overall HAR output file from Opera somehow also accumulated to a very large size of 221MB.

Answer 2

Just strange behavior on my Chrome 80 on Ubuntu: HAR file wrote fast first 8MB (in this case file truncated), after that file continue writing very slow (~1MB in minute) and go to 75MB (in my case) in hour or more.