Yeah, I see no good reason for why the benchmark results show the Master vs 
previous release.  That information does not seem relevant to the PR and I 
would bet it's causing people to ignore the benchmark when it is actually 
saying something useful. 

I think that Master vs previous release section should be moved to a 
separate program which is run everytime there is a new release, because 
this information still seems useful just to see the general performance 
trend and to see if there are any big regressions.

It would be nice if this could be run automatically.  Does this type of 
thing seem doable in Github actions?
On Monday, April 1, 2024 at 3:11:18 AM UTC-5 [email protected] wrote:

> I agree with this. The usability of the current benchmarking output
> needs to be improved a lot. Ideally, it should work in a way that
> people are actually alerted to real performance regressions, and not
> bothered if there aren't any performance regressions.
>
> Another issue is that the PR benchmarks comments also list the changes
> in master since the previous release. This is almost always completely
> irrelevant to the PR in question, so we should remove or demote this
> information.
>
> If the benchmarking system was robust enough, there would never be a
> regression in master, because regressions in PRs would be disallowed,
> the same as test failures in PRs are currently disallowed.
>
> Aaron Meurer
>
> On Mon, Apr 1, 2024 at 1:13 AM Jason Moore <[email protected]> wrote:
> >
> > This is my opinion, not sure if it is shared, but I don't think anyone 
> uses the information that is displayed on the pull request. This isn't 
> because the information isn't accurate or informative, but because of how 
> and when it is presented. I haven't looked at all pull requests, of course, 
> but I don't recall one where someone noticed the slowdown and it led to 
> change in the PR. It has probably happened, but it happens rarely.
> >
> > The current system shows two things: timing differences in the current 
> commit vs last release and current commit vs master. The current commit vs 
> last release is most helpful for making the new release, but can be 
> confusing for the PR because it contains slowdowns/speedups from more than 
> your own PR work. The current commit vs master should show the PR author 
> that they have made some good or bad change wrt to the benchmarks. That's 
> all we really need to tell them (besides which benchmarks are slower and by 
> how much). It does this, but it is easy to just not read it.
> >
> > The old way was that some of us monitored the asv generated websites and 
> then opened issues about slowdowns and commented on the old PRs. This isn't 
> automated but it did lead to specific comments on PRs that PR authors then 
> were very aware of.
> >
> > Jason
> > moorepants.info
> > +01 530-601-9791 <(530)%20601-9791>
> >
> >
> > On Mon, Apr 1, 2024 at 2:57 AM Sam Lubelsky <[email protected]> wrote:
> >>
> >> Is there any specific problems with the current pull request 
> benchmarking system that this project should address?
> >> On Sunday, March 31, 2024 at 1:41:58 PM UTC-5 [email protected] wrote:
> >>>
> >>> HI Sam,
> >>>
> >>> I think that idea could be a bit outdated. I'm not sure if the text 
> was updated for this year. If it was, then someone else can speak up about 
> it.
> >>>
> >>> I think that improving our sympy_benchmarks repository with more and 
> better benchmarks and making the benchmarking system that we have setup 
> with each pull request to sympy more useful is a better focus. I'm not sure 
> we can run the benchmarks on a dedicated machine unless we spend some sympy 
> funds to do that.
> >>>
> >>> We basically want to know if a pull request slows down sympy and make 
> sure the pull request authors are warned about this in a clear way before 
> merging. In the past it was helpful to see the historical speed of various 
> SymPy benchmarks (here is an example I used to maintain: 
> https://www.moorepants.info/misc/sympy-asv/) but that does require a 
> dedicated machine so that benchmarks are comparable over time.
> >>>
> >>> Another thing I thought would be useful in the past, is to run 
> benchmarks as part of the release process (or just before) so we can see if 
> the upcoming release is slower than the prior release.
> >>>
> >>> Jason
> >>> moorepants.info
> >>> +01 530-601-9791 <(530)%20601-9791>
> >>>
> >>>
> >>> On Sun, Mar 31, 2024 at 8:13 PM Sam Lubelsky <[email protected]> 
> wrote:
> >>>>
> >>>> Sorry if it is kinda intimidating that I put so many questions. I 
> really just need the answer to the first one to make my proposal. I know I 
> am a little late to GSOC, but I've really enjoyed getting to know the Sympy 
> community a little bit in this past week and I am committed to putting 
> together a good project proposal.
> >>>> Thanks,
> >>>> Sam.
> >>>> On Friday, March 29, 2024 at 4:37:55 PM UTC-5 Sam Lubelsky wrote:
> >>>>>
> >>>>> I put an introduction a few emails down, but to recap my name is 
> Sam, I'm a college freshman, and I'm very interested in working on 
> improving Sympy's benchmarking services over this summer through GSOC.
> >>>>>
> >>>>> While going through the project description I had a few questions:
> >>>>>
> >>>>> 1) "It also needs an automated system to run them"
> >>>>> What exactly is meant by this. Right now, github actions seems to be 
> already automatically running benchmarking after each pr. Why is this not 
> an automated system? Is the meaning of automated system something that runs 
> weekly/monthly on the whole repo, generates a benchmark report and sends it 
> somewhere?
> >>>>>
> >>>>> 2) How to go about hosting benchmarks on a remote, dedicated 
> machine? What's the general idea of how to go about this in open source 
> project. Is there money available to pay some cloud provider to host it? 
> Free hosting options?(doesn't seem reliable enough for benchmarking).
> >>>>>
> >>>>> 3) SymEngine vs SymPy. I'm not familiar with SymEngine. 
> Approximately how similar are SymPy and SymEngine? Is making the project 
> also work with SymEngine more of a quick fix(≈1-2 weeks) or should I expect 
> it to take longer?
> >>>>>
> >>>>> 4) Current Benchmark Suite
> >>>>> "We currently have a benchmarking suite and run the benchmarks on 
> GitHub Actions, but this is limited and is often buggy"
> >>>>>
> >>>>> What are the limitation(s) to github actions that this project 
> should address?
> >>>>> If we don't use github actions, is there another way to make it run 
> after every PR like we have now?
> >>>>>
> >>>>> 5) Where are the tests run now?
> >>>>> On the project description it says " the results are run and hosted 
> Ad Hoc", which I assumes means whatever computer is running all the other 
> PR tests. Just want to make sure this is correct.
> >>>>>
> >>>>>
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