Is the GHC release process documented?

Simon Marlow marlowsd at
Fri Nov 30 13:11:20 CET 2012

On 30/11/12 03:54, Johan Tibell wrote:
> While writing a new nofib benchmark today I found myself wondering
> whether all the nofib benchmarks are run just before each release,
> which the drove me to go look for a document describing the release
> process. A quick search didn't turn up anything, so I thought I'd ask
> instead. Is there a documented GHC release process? Does it include
> running nofib? If not, may I propose that we do so before each release
> and compare the result to the previous release*.
> * This likely means that nofib has to be run for the upcoming release
> and the prior release each time a release is made, as numbers don't
> translate well between machines so storing the results somewhere is
> likely not that useful.

I used to do this on an ad-hoc basis: the nightly builds at MSR spit out 
nofib results that I compared against previous releases.

In practice you want to do this much earlier than just before a release, 
because it can take time to investigate and squash any discrepancies.

On the subject of the release process, I believe Ian has a checklist 
that he keeps promising to put on the wiki (nudge :)).


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