Greetings everyone,
I’m currently running a private instance, and exploring benchmarks. Going into /benchmarks/ brings up the docTime graphs of the benchmarks that I have running. when I click on a data point two options are available:
[list]
[]Scatter Plot
[]Comparison Distribution
[/list]
Scatter Plot works great and it offers a ton of valuable information. Comparison distribution is a different story though. It leads me to /benchmarks/delta.php. There is supposed to be a graph on this page, which does not show. Digging through the code I end up in /benchmarks/data.inc.php, on function [color=#32CD32]LoadDelta[/color]. In the forEach loop found in this function, there are two lines of code that read like this:
[php]foreach ($median_data[$config][$loc][$cached] as $url => &$data) {
if (array_key_exists($url, $median_data[$ref][$refLoc][$cached])) {[/php]
This piece of code is failing because it tries to find the url from config::loc::cached in ref::refloc::cached but the function [color=#32CD32]loadMedianData[/color] never creates such structure. [color=#32CD32]LoadMedianData [/color]creates an associative array containing the parsed results of the benchmark. Let me provide an example:
Lets say we run a benchmark with two configurations:[color=#32CD32] ‘SiteA’[/color] and ‘[color=#32CD32]SiteB[/color]’. Site A is running from location ‘[color=#32CD32]Office_IE9.Cable[/color]’ and it has 3 urls: [color=#32CD32]www.mysitea.com[/color], [color=#32CD32]www.mysitea.com/my_video_page[/color], and [color=#32CD32]www.mysitea.com/some_page[/color]. Site B is running from ‘[color=#32CD32]Office_wptdriver:Chrome.3G[/color]’ and it has also 3 urls: [color=#32CD32]www.mysiteb.com[/color], [color=#32CD32]www.mysiteb.com/my_profile_page[/color], and [color=#32CD32]www.mysiteb.com/some_lost_page[/color] .
After succesful completion of the benchmark, function LoadMedianData retuns an array that looks something like this:
[php]
$median_data[‘SiteA’][‘Office_IE9.Cable’][0][‘http://www.misitea.com/’] = associative_results_array()
$median_data[‘SiteA’][‘Office_IE9.Cable’][0][‘404错误！’] = associative_results_array()
$median_data[‘SiteA’][‘Office_IE9.Cable’][0][‘404错误！’] = associative_results_array()
$median_data[‘SiteB’][‘Office_wptdriver:Chrome.3G’][0][‘http://www.misiteb.com/’] = associative_results_array()
$median_data[‘SiteB’][‘Office_wptdriver:Chrome.3G’][0][‘http://www.misiteb.com/my_profile_page’] = associative_results_array()
$median_data[‘SiteB’][‘Office_wptdriver:Chrome.3G’][0][‘http://www.misiteb.com/some_lost_page’] = associative_results_array()
[/php]
Following this example, when execution arrives to:
[php]foreach ($median_data[$config][$loc][$cached] as $url => &$data) {
if (array_key_exists($url, $median_data[$ref][$refLoc][$cached])) {[/php]
It tries to run something like this:
[php]foreach ($median_data[‘SiteA’][‘Office_IE9.Cable’][0] as $url => &$data) {
if (array_key_exists(‘http://www.misitea.com/’, $median_data[‘SiteB’][‘Office_wptdriver:Chrome.3G’][0])) {[/php]
This statement fails all the time, and the function always retuns NULL, thus no graph 
My questions are: What is the purpose of delta.php? I mean, if I know what is supposed to do then I can ‘fix’ it. I’m I missing something in the setup of my benchmarks? No mean to insult, but is the code possibly faulty?
Thank you in advance for your answers.
Cheers,