On 8/17/2012 6:33 PM, Richard Eckart de Castilho wrote:
> Thanks for the pointer Marshall. Given though that the whole process ran for
> about
> 30 minutes and the setup was comparatively simple, the JIT effect should be
> hardly
> noticeable. Would you agree?
yep.
>
> In any case, the measure is not meant to be exact, but rather give a better
> idea about the
> performance improvement of binary serialization over XMI. At least I am pretty
> convinced now that I should switch from XMI to binary persistence in some
> scenarios.
>
> -- Richard
>
> Am 18.08.2012 um 00:02 schrieb Marshall Schor:
>
>> One other thing I've noticed is important - because of Java's JIT, you need
>> to
>> "warm up" things before doing measurements. Most commonly, people run the
>> thing-being-measured multiple times, in a loop, and see a speedup - until
>> there's no more speedup.
>>
>> -Marshall
>>
>> On 8/17/2012 5:40 PM, Richard Eckart de Castilho wrote:
>>> Small update in case anybody is interested. I ran the experiment again,
>>> this time writing to a ByteArrayOutputStream (initialized with a 512kb
>>> buffer). So it's measuring encoding time now, no I/O, no GZip.
>>>
>>> bin: 0:04:17.699 11.266.341.029 byte
>>> xmi: 0:24:40.485 23.961.447.013 byte
>>>
>>> That's more the expected difference. Still no results for reading though.
>>>
>>>>> I am looking for a way to improve loading times in an application, so I
>>>>> did a little experiment with binary CAS serialization to see if it was
>>>>> superior to XMI serialization. For serialization I used the
>>>>> CASCompleteSerializer to serialize the type-system and heaps into the
>>>>> same file using Java object serialization - at least that is what I
>>>>> understood it should do. To read in these files, I would deserialize the
>>>>> CASCompleteSerializer and initialize a CAS from it using CASImpl.reinit().
>>>>>
>>>>> 96.400 files
>>>>>
>>>>> plain text (uncompressed) : 581.865.593 Byte
>>>>> binary (serialized java, gzip) : 0:47:02.835 3.555.449.597 Byte
>>>>> xmi (gzip) : 1:20:31.535 4.712.633.769 Byte
