bzr heads help

[David Muir]

On 30/08/11 15:35, Martin Pool wrote:
> On 30 August 2011 15:21, David Muir <davidkmuir at gmail.com> wrote:
>> Two issues:
>>
>> 1. I noticed that running bzr heads --all on a relatively small
>> repository (~1800 revs) takes quite a long time:
>>
>> $ bzr heads --all --debug-time
>> get heads: 0.134533882141
>> make head marks: 79.3243851662
>>
>> Fetching just the live heads takes just as long.
>> Is it supposed to be that slow?
> No, it's not supposed to be slow.  Running it on bzr which has much
> more history takes 19s: faster would be better, but this is
> proportionally much faster.
>
> A good way to debug this, if you want to work on it, is to add
> '--lsprof-file heads.callgrind' and then load that up in kcachegrind.
> It looks to me like it spends a lot of time recursing to find the
> possible branches under the repository and that might fairly easily be
> improved by for example telling it not to look recursively inside
> checkouts, or perhaps not to distinguish live and dead heads.

That would explain it. I have about 50 or so branches that I think it's
recursing through.

Thanks,
David