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Re: Performance improvement suggestion when comparing revisions of a large file

From: Martin Fuller <martin_at_bellvedi.com>
Date: Tue, 20 Sep 2016 13:09:14 +0100

On 15 September 2016 at 17:48, Stefan Küng <tortoisesvn_at_gmail.com> wrote:
>
> On 15.09.2016 12:19, Martin Fuller wrote:
> > On 14 September 2016 at 21:11, Stefan Küng <tortoisesvn_at_gmail.com
> > <mailto:tortoisesvn_at_gmail.com>> wrote:
> >>
> >> On 14.09.2016 21:14, Martin Fuller wrote:
> >> > I work with a few large text files in SVN, say 50MB, and our server
is
> >> > not on a LAN. When I use "SVN Show Log" on a large file and then
> >> > "Compare revisions" Tortoise downloads 2 full copies of the file,
which
> >> > takes 80 seconds The actual diff may take 5 seconds if not much
> >> > changed. It would be much quicker if it downloaded diffs instead.
> >> > "Show changes" also downloads 2 full copies of the file.
> >> >
> >> > [...]
> >>
> >> Use the "Show changes as unified diff" feature - that will only fetch
> >> the diff.
> >
> > "Show changes as unified diff" also downloads 50MB (one full file). The
> > diffs themselves were less than 100KB.
>
> Then you have to update the server: newer servers only send the diff.
>
> > I would like to use "Compare revisions" because it gives more context.
>
> Well yes, it gives more context because it has both full files. And to
> get that, they have to be downloaded.
>

A few of the commands manage to use diffs to quickly produce the whole
file. Please can more of them do it?

"Compare with working copy" and "Update item to revision" are quick
(revision).
"Save revision to..." is quick when clicking on a revision but slow when
clicking on a file.
"Compare with previous revision" and "Compare revisions" are slow (1 or 2
revisions).
"Show changes" is slow (file).
"Show changes as unified diff" is quick when clicking on 1 or 2 revisions
(top panel) but slow when clicking on a file (bottom panel).

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Received on 2016-09-20 14:09:56 CEST

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