All Questions
11 questions
0
votes
1
answer
45
views
How chrome devtools calculates time in performance chart for last item?
Here is my profile example:
{
"nodes": [
{
"id": 1,
"callFrame": {
"functionName": "ROOT",
"scriptId": &...
7
votes
0
answers
762
views
How do I attach a sourcemap to a node.js (V8) CPU profile (.cpuprofile) in chrome dev tools?
I've used the Node.js Inspector module to produce a CPU profile (.cpuprofile file) from a production server. I'm able to load it into chrome dev tools (Performance tab) without issue.
The flame graph ...
- 53.9k
0
votes
0
answers
321
views
Javascript Profiling with Chrome Devtools
I am trying to profile some javascript code on this url by setting an event listener breakpoint on mouse click.
When you click on any flight on the results page, it opens a new tab with another link ...
- 3,000
2
votes
0
answers
136
views
JS DevTools profile has a lot of dropped frames
I'm developing an application that draws a lot of things on the HTML canvas.
I have a lot of dropped frames in my profile, however, it has a lot of idle time in each frame and I don't understand why a ...
- 130
0
votes
1
answer
36
views
Gather Layer Borders data through Javascript
I am writing an own tool for profiling my web performance issues. I spotted an necessity to observer amount of separate composite layers on my website. I am looking through web APIs on MDN, but I can'...
0
votes
1
answer
202
views
JQuery animate lags on first run
I'm troubleshooting a bug in a UI where the first time the menu is opened it is very slow. Anywhere from 1-3 seconds. Subsequent openings are just as fast as you would expect.
Below you will see ...
user736893
7
votes
1
answer
901
views
Chrome profiler - Why do functions sometimes stop for a little time?
Here is a picture of my web execution captured by Chrome Performance Devtools:
I notice that functions will be stopped many times during execution, when my web functions are stopped Chrome executes ...
- 7,748
12
votes
1
answer
347
views
Javascript profiling mystery - closure variables
I was testing performance (with chrome timeline) on cases if variable defined inside a closure. So it's values would not be exposed to user.
As expected run_proto_fn run few times faster and with ...
- 180
0
votes
2
answers
836
views
Percentages in CPU profiler in Chrome
What do the percentages in the chrome cpu profiler for the "Heavy (Bottom Up)" view indicate? Specifically I mean in the "Total" column.
I had thought percentage of total cpu time (as in total cpu ...
- 1,859
0
votes
1
answer
128
views
javascript profiling: way of showing top-down tree for individual function?
Say I have a function OfInterest, called by functions A and B, and that calls function X and Y. I'm looking for a way of viewing:
OfInterest -- 200 ms total time
X -- 150 ms total time
Y -- ...
- 9,558
9
votes
1
answer
4k
views
Chrome DevTools Profiler
Searching for some memory leak in a Javascript application, I try to use the Chrome DevTools Profiler. Is there some detailed information describing all entries that might be found in it?
For example,...
- 5,196