[jboss-dev] Small boottime improvement

[Kabir Khan]

Getting rid of the @Dependency annotation checks from AOPDependencyBuilder https://jira.jboss.org/jira/browse/JBKERNEL-98 brings the startup time down to the 18s range.

kernel 2.2.0-SNAPSHOT, from a few days ago (Alpha6 with the extra resolveContexts loop optimization)
mdr 2.2.0-Alpha1
================================================================================
20s:192ms (1)
19s:733ms (3)
19s:968ms (4)

kernel 2.2.0-SNAPSHOT, includes the @Dependency stuff
mdr 2.2.0-SNAPSHOT
============================================
18s:905ms (2)
18s:604ms (4)
18s:657ms (6)



On 12 Feb 2010, at 15:50, Kabir Khan wrote:

> I found that ScopeKey's hashCode was not being calculated correctly (http://community.jboss.org/message/526058#526058), and fixed this in a local jboss-mdr snapshot, which gives another tiny enhancement. Here are today's numbers, same setup as last time.
> 
> kernel 2.2.0-Alpha5
> mdr 2.2.0-Alpha1
> ===============
> 34s:696ms (1)
> 20s:562ms (2)
> 20s:349ms (7)
> 20s:463ms (10)
> 20s:622ms (13)
> 20s:582ms (16)
> 20s:35ms (19)
> -------------------------
> Average ignoring (1): 20s436ms
> 
> kernel 2.2.0-SNAPSHOT
> mdr 2.2.0-Alpha1
> ===================
> 29s:637ms (3)
> 19s:627ms (4)
> 19s:786ms (8)
> 20s:2ms (11)
> 20s:432ms (14)
> 19s:827ms (17)
> 19s:731ms (20)
> -------------------------------
> Average ignoring (3): 19s900ms
> 
> kernel 2.2.0-SNAPSHOT
> mdr 2.2.0-SNAPSHOT
> ============================
> 27s:167ms (5)
> 19s:834ms (6)
> 19s:702ms (9)
> 19s:349ms (12)
> 20s:228ms (15)
> 19s:346ms (18)
> 19s:315ms (21)
> ----------------------------
> Average ignoring (5): 19s629ms
> 
> Now that I'm more into profiling stuff, I'll see if profiling minimal as suggested by Bill makes more sense to me, if not I'll do a few more cycles of these.
> 
> 
> On 11 Feb 2010, at 12:25, Kabir Khan wrote:
> 
>> I have been doing some work on profiling and optimizing the jboss-dependency project [1] for kernel 2.2.0.Alpha6 and it seems to have had a small, but still measurable impact :-)
>> 
>> I did a few startups of AS with jboss kernel 2.2.0.Alpha5 and with a local snapshot. This snapshot contains the work done for Alpha6 with the addition of removing the break in the resolveContexts loop as mentioned in the forum thread.
>> 
>> The startups were done on a freshly rebooted machine with nothing else running. The startup orders are given in brackets, so I started Alpha5 twice, then SNAPSHOT twice and so on.
>> 
>> 2.2.0-Alpha5
>> ----------------------
>> 37s:247ms (1)
>> 20s:573ms (2)
>> 20s:275ms (5)
>> 20s:127ms (7)
>> 20s:433ms (9)
>> 20s:329ms (10)
>> 20s:890ms (13)
>> 
>> 
>> 2.2.0-SNAPSHOT
>> ------------------------
>> 29s:563ms (3)
>> 19s:965ms (4)
>> 19s:821ms (6)
>> 20s:332ms (8)
>> 19s:618ms (10)
>> 19s:905ms (12)
>> 19s:900ms (14)
>> 
>> One strange thing is that the first time I started each server they took loads longer than the other times, does somebody know the reason for that? 
>> 
>> Ignoring those initial times leaves me with average start times of:
>> Alpha5: 20s437ms
>> SNAPSHOT: 19s923ms
>> 
>> I'm going to have a final look at jboss-dependency to see if there are any other obvious and easy fixes before moving on to have a look at jboss-kernel.
>> 
>> [1] http://community.jboss.org/message/525047#525047
>> _______________________________________________
>> jboss-development mailing list
>> jboss-development at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/jboss-development
> 
> 
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