Unoptimized gzip and cache settings

[digitarald]

More details on https://www.webpagetest.org/result/170724_VE_23RP/1/performance_optimization/

Missing gzip: https://screenshots.firefox.com/static/img/spinner.svg?rev=8.1.0-465-gcce97ba

Caching can be extended to multiple days for most static resources, given that the rev is in the query (to some, why not to all?):

[ghost]

@relud is turning on gzip a switch you can flip?

[relud]

yeah, there's an nginx setting for it. what content-types should we compress? I have to specify each of them, except for text/html which is automatic. looks like a good list for you would be image/png image/svg+xml application/javascript text/css, but I don't know all the types that screenshots serves, so I'm just guessing.

the settings look like this: https://github.com/mozilla-services/cloudops-deployment/blob/master/projects/normandy/puppet/modules/normandy/files/http_normandy_root_location.conf#L21-L23

[relud]

this should enable it, on the types i listed above: https://github.com/mozilla-services/cloudops-deployment/pull/1166

[ianb]

We shouldn't have compression on image/png, they are already fully compressed. The only thing I'd add is application/x-font-ttf and application/json

[relud]

okay, i updated the list to image/svg+xml application/javascript application/json application/x-font-ttf text/css in that PR

[relud]

okay, mozilla-services/cloudops-deployment#1166 is merged, so the next to deploys to dev/stage will pick up this change.

[ianb]

One of the last issues fixed in #3592, and #3590 and #3591 cover the rest.