I recently did a performance test with some Javascript that does a lot of data processing in the browser, and noticed that the time it takes for a particular task is much longer (3.5-4x) with the browser console open than it is without, even though nothing is printed to the browser console (prior to or during the task) and there is no filter on new messages. The processing does not make a lot of DOM changes either. The Network tab was not active or recording traffic during this time, and there wasn't any network traffic anyway. No breakpoints are set anywhere, in active or inactive code, and there are no debugger statements in the code.
it might be due to your preferences open you devtools click on settings is the ⚙️ enter image description here
on your left side "gear" I think thats who is it call... sorry for my english I am a ESL under network section you'll probably have checked the option disable cache while devtools open... or something like that
if it is not checked then go to Network tab and search for "disable cache" uncheck it enter image description here
