[Chandler-dev] Ship with prebuilt repo or not?

[Mike Taylor]

Andi on IRC pointed out the one reason why a pre-generated repository 
is not viable:  every user would have the exact same UUID's for 
anything that is OOTB.

I think this means that pre-generated is just not an option so the 
splash screen change is the best solution right now.

On Jun 7, 2007, at 7:46 PM, Mike Taylor wrote:

> I brought this up on IRC but wanted to echo it here:
>
> I thought we could pre-generate the repository during the distribution 
> phase (which would solve the portability issue) but it was mentioned 
> that certain UI information like size, color depth and state would 
> make the pre-built repository look bad or even not work.
>
> If this is the only thing that would prevent a pre-generated repo from 
> being used couldn't we not store this information?  Was it stored for 
> performance reasons?
>
> Also, if we are storing this information, I think we setting ourselves 
> up for a lot of bugs in the future when someone does any monitor 
> upgrading.
>
> If pre-generation is still not an option then I would +1 the splash 
> screen change.
>
> On Jun 7, 2007, at 4:17 PM, Heikki Toivonen wrote:
>
>> We need to make a decision with regards to bug
>> https://bugzilla.osafoundation.org/show_bug.cgi?id=4192, which is 
>> about
>> shipping Chandler with prebuilt repository to speed up the first 
>> startup.
>>
>> First time startup is about three times slower than when starting with
>> an existing empty repository. On my computer first time startup takes 
>> 10
>> seconds, on the PPC Mac mini we use for performance tests it would 
>> take
>> about 45 seconds.
>>
>> The rationale behind this bug is that first time impressions are
>> important, and if the very first time to launch Chandler takes 
>> forever,
>> it leaves a bad impression.
>>
>> Personally I am against this for various reasons:
>>
>> * This would mean either shipping with a prebuilt repository, which
>> would increase the download size quite a bit (on Linux the first empty
>> repo is 15M uncompressed, 5.2 M gzipped, or the absolute minimum, 1.8 
>> M
>> when using gzipped repository backup where files that will be
>> automatically rebuilt have been removed), or generating the repository
>> during install time by launching Chandler at the end of installation 
>> (we
>> don't have installers for all platforms, and users can get Chandler
>> without installer as well; Launching at the end of install is kind of
>> rude, and can lead to confusion in other ways.
>>
>> * Even with prebuilt repository, we'd need to copy the prebuilt repo 
>> to
>> the correct location on first startup, which would in itself also slow
>> down the first startup.
>>
>> * It seems like a fair bit of work for just the first startup.
>>
>> My suggestion is to change the progress messages for first startup
>> splash screen to say something like "Constructing database" to make it
>> clear that this only happens once.
>>
>> -- 
>>   Heikki Toivonen
>>
>>
>> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
>>
>> Open Source Applications Foundation "chandler-dev" mailing list
>> http://lists.osafoundation.org/mailman/listinfo/chandler-dev
>>
> ---
> Bear
>
> Build and Release Engineer
> Open Source Applications Foundation (OSAF)
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> http://www.osafoundation.org
>
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---
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bear at osafoundation.org
http://www.osafoundation.org

bear at code-bear.com
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