This has been reported
in https://issues.jenkins-ci.org/browse/JENKINS-56243. Unfortunately the
workaround is only temporary.
On Friday, 8 February 2019 00:57:53 UTC-8, Kurt Routley, MSc wrote:
>
> Hello,
>
>
> After upgrading from Jenkins LTS 2.150.1 to 2.150.2, we observed
> significant slowdown when loading any page on Jenkins. Load times were
> previously sub-second, and were now taking 4 seconds or longer after the
> upgrade.
>
>
>
> Workaround for this was to clear cookies from the local browser for the
> Jenkins instance. After re-login to Jenkins, load times were back to normal
> for the user.
>
>
>
> Since the security advisory for
> https://jenkins.io/security/advisory/2019-01-16/ was the main motivation
> for the upgrade, you may want to mention in the security advisory about the
> additional step for users to clear their cookies for the Jenkins instance,
> as the pre-existing cookies appear to be incompatible.
>
>
>
> Thanks,
>
> - Kurt Routley, MSc
>
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