Request slowdowns / increase in request wait times

Website, Application, Performance
1

While running perfomance tests I noticed that there is additional wait time across the board now compared to 2 months ago.

As an example, our favico download time increased from 16ms to 50-60ms, exclusively due to wait times, in both instances the response header included:
cache-control: public, max-age=86400000, s-maxage=86400000, stale-while-revalidate=86400000
cf-cache-status: HIT

While the individual contribution can be considered minor, it translates into a significant impact to performance metrics for the page as a whole.

I would be grateful for any suggestions regarding:

  1. How to debug / pinpoint the source of the additional overhead.
  2. How to restore the previous performance
  3. Things I may have overlooked.

Thanks In Advance,
Joe

2

You might be reaching a different PoP than from where you were testing from a few months ago

You could investigate further with this tool Measure TTFB from 35 Locations - SpeedVitals (Run it twice for cache HIT)

1 Like
3

Thank you for the suggestion, it looks like a nice tool - unfortunately the values there do not match what I see from GTmetrics, using a fixed location ( HK ) nor running locally, in both cases the TTFB are much higher, even when running multiple times in quick succession against page resources that identify as cache-hit and controlling for the region the requests are made from.

4

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