AJAX Page load time analysis

[bc9ams <bc...@gmail.com>]

Hi,

I've been using jmeter to run some page load times for a few sites, but I've
run into a bit of a problem. Basically I want to get stats of how long whole
pages (page + resources) take to load over a period of time, with differing
number of users hitting the site.

I realise that there is the 'Download all HTML content' checkbox which will
do just this, but unfortunately it does not execute all the AJAX components
of the website (of which there are many - basically the whole site). So this
gives a deceptively low impression of the load time of pages.

When you record a page load with the HTTP proxy (to capture all the
resources, including the AJAX elements), and then run a test with it - it
seems to treat each resource separately in a Aggregate / Summary report, so
its difficult to get this sort of information (many of the images / AJAX
resources all run the same server-side script so appear as the same entry in
the report when they are in reality different resources [e.g. "image.php"
where the requests were image.php?id=1234 and image.php?id=5678]).

Is there any kind of mechanism to roll-up/group a set of resources into one
transaction element to achieve this sort of reporting?

Oh and is there an out-of-the box mechanism to limit bandwidth of what
jmeter allows each 'user' to use?

Many thanks.

Re: AJAX Page load time analysis

[Ronan Klyne <ro...@groupbc.com>]

bc9ams wrote:
> Hi,
> 
> I've been using jmeter to run some page load times for a few sites, but I've
> run into a bit of a problem. Basically I want to get stats of how long whole
> pages (page + resources) take to load over a period of time, with differing
> number of users hitting the site.
> 
> I realise that there is the 'Download all HTML content' checkbox which will
> do just this, but unfortunately it does not execute all the AJAX components
> of the website (of which there are many - basically the whole site). So this
> gives a deceptively low impression of the load time of pages.
> 
> When you record a page load with the HTTP proxy (to capture all the
> resources, including the AJAX elements), and then run a test with it - it
> seems to treat each resource separately in a Aggregate / Summary report, so
> its difficult to get this sort of information (many of the images / AJAX
> resources all run the same server-side script so appear as the same entry in
> the report when they are in reality different resources [e.g. "image.php"
> where the requests were image.php?id=1234 and image.php?id=5678]).
> 
> Is there any kind of mechanism to roll-up/group a set of resources into one
> transaction element to achieve this sort of reporting?

Seems like you want the Transaction Controller. Add your requests as 
children of this controller, and it'll generate a sample representing 
all of them, with summed up times.

> Oh and is there an out-of-the box mechanism to limit bandwidth of what
> jmeter allows each 'user' to use?
Not sure, personally. Perhaps the Constant Throughput Timer - I believe 
this does what you're describing, but I've never used that one...

	# r

-- 
Ronan Klyne
Business Collaborator Developer
Tel: +44 01189 028518
ronan.klyne@groupbc.com
www.groupbc.com

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