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Issue metadata

Status: Fixed
Owner:
Closed: Jan 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 3
Type: Bug

Blocked on:
issue 667631



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New UI is slower on the task page (when data is cached)

Project Member Reported by tansell@chromium.org, Nov 22 2016

Issue description

https://chromium-swarm.appspot.com/task?id=32a33359c341d310&refresh=10&show_raw=1 -- Takes 3.77s

https://chromium-swarm.appspot.com/oldui/user/task/32a33359c341d310 -- Finished 747ms.

I've attached the output from the network tool in developer tools. This appears to be to do with caching and the fact it has to render stuff locally with javascript.

On the first load, the new UI is faster. However when switching between multiple different tasks quickly (that you have seen before) the old UI is *much* faster.

 
old-ui-speed.png
99 KB View Download
new-ui-speed.png
132 KB View Download
Actually I take this back. The old UI is frequently faster even when reloading. On a lot of page loads, the old-ui is taking ~2-3 seconds while the new UI is taking ~3-4 seconds.

With the old UI, we could shave 50% of the time by fixing https://bugs.chromium.org/p/chromium/issues/detail?id=667631


speed-new-ui.png
129 KB View Download
speed-old-ui.png
93.7 KB View Download

Comment 2 by kjlubick@google.com, Nov 28 2016

Blockedon: 667631
See #667631.  The screenshots attached seem to show most of the time is actually waiting for the etag checks (i.e the requests whose response is 304), and I don't know how to fix that other than lay better fiber to Australia.  (In North Carolina, USA, I see those 304 requests take about 40ms, rather than ~400ms)

Again, this could be because once you have dev tools open, the cache isn't used as much: https://bugs.chromium.org/p/chromium/issues/detail?id=667631#c1

Let me know what you experience, both with dev tools and without dev tools, now that caching is enabled.

Comment 3 by kjlubick@google.com, Jan 19 2017

Status: Fixed (was: Assigned)
If this is still a problem, please re-open

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