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Home » Modeling » EMF "Technology" (Ecore Tools, EMFatic, etc)  » [EMFStore] Performance of large change packages
[EMFStore] Performance of large change packages [message #1449901] Tue, 21 October 2014 23:44 Go to next message
Scott Dybiec is currently offline Scott DybiecFriend
Messages: 148
Registered: July 2009
Senior Member
I noticed that the CPU was pegged when applying large EMFStore change
packages operations (updating), and since my application is somewhat
performance-sensitive, I decide to profile the execution of the EMFStore
code that does this work.

Applying 100 or so changes takes 25 seconds my quad core machine. The
attached output breaks down where the CPU time was spent by method call.

Hand-written EMF code that performs that adds the same elements to the
same lists takes less than a second. I expected that EMFStore would be
2x or 3x slower than the equivalent EMF hand-written code, but not two
orders of magnitude slower.

Is this expected?
Re: [EMFStore] Performance of large change packages [message #1451329 is a reply to message #1449901] Thu, 23 October 2014 17:17 Go to previous messageGo to next message
Maximilian Koegel is currently offline Maximilian KoegelFriend
Messages: 253
Registered: July 2009
Senior Member
Hi Scott,

no this is definitely not expected. Can you provide an isolated test
case maybe?

Cheers,
Maximilian

Am 22.10.2014 01:44, schrieb scott@xxxxxxxx:
> I noticed that the CPU was pegged when applying large EMFStore change
> packages operations (updating), and since my application is somewhat
> performance-sensitive, I decide to profile the execution of the EMFStore
> code that does this work.
>
> Applying 100 or so changes takes 25 seconds my quad core machine. The
> attached output breaks down where the CPU time was spent by method call.
>
> Hand-written EMF code that performs that adds the same elements to the
> same lists takes less than a second. I expected that EMFStore would be
> 2x or 3x slower than the equivalent EMF hand-written code, but not two
> orders of magnitude slower.
>
> Is this expected?


--
Maximilian Kögel

Get Professional Eclipse Support: http://eclipsesource.com/munich
Re: [EMFStore] Performance of large change packages [message #1454063 is a reply to message #1451329] Mon, 27 October 2014 23:02 Go to previous message
Scott Dybiec is currently offline Scott DybiecFriend
Messages: 148
Registered: July 2009
Senior Member
Max,

I'll look into creating a test case or getting you more data on the problem.

$cott

On 10/23/2014 1:17 PM, Maximilian Koegel wrote:
> Hi Scott,
>
> no this is definitely not expected. Can you provide an isolated test
> case maybe?
>
> Cheers,
> Maximilian
>
> Am 22.10.2014 01:44, schrieb scott@xxxxxxxx:
>> I noticed that the CPU was pegged when applying large EMFStore change
>> packages operations (updating), and since my application is somewhat
>> performance-sensitive, I decide to profile the execution of the EMFStore
>> code that does this work.
>>
>> Applying 100 or so changes takes 25 seconds my quad core machine. The
>> attached output breaks down where the CPU time was spent by method call.
>>
>> Hand-written EMF code that performs that adds the same elements to the
>> same lists takes less than a second. I expected that EMFStore would be
>> 2x or 3x slower than the equivalent EMF hand-written code, but not two
>> orders of magnitude slower.
>>
>> Is this expected?
>
>
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