[JIRA] (JENKINS-60541) Wrong 90%Line Calculation in the Performance Report

[ganginenisarath783@gmail.com (JIRA)]

sarath gangineni created an issue

Jenkins / JENKINS-60541 Wrong 90%Line Calculation in the Performance Report Issue Type: Bug Assignee: Andrey Pokhilko Components: performance-plugin Created: 2019-12-19 12:35 Priority: Major Reporter: sarath gangineni Plugin version: 3.17   The 90th percentile value is not calculated correctly when the index is not an integer. For example, if we have the values as response times  1698, 1702, 1754, 1766, 1774, 1805, 1821, 1892, 2069, 2345, 2643, 2920, 4511, 5075   Compute the position of the p^th^ percentile (index i): i = (p / 100) * n), where p = 90 and n = 14 i = (90 / 100) * 14 = 12.6   The index i is not an integer, we need to round up the index (i = 13) ⇒ the 90^th^ percentile is the value in 13^th^ position, or 4511   But in the report, it is raking 12th position or 2920 as 90% value Add Comment

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[ganginenisarath783@gmail.com (JIRA)]

sarath gangineni updated an issue

Jenkins / JENKINS-60541 Wrong 90%Line Calculation in the Performance Report

Change By: sarath gangineni

Plugin version: 3.17   The 90th percentile value is not calculated correctly when the index is not an integer.

For example, if we have the below values as response times

1698, 1702, 1754, 1766, 1774, 1805, 1821, 1892, 2069, 2345, 2643, 2920, 4511, 5075

Compute the position of the p^th^ percentile (index *i*): *i* = (p / 100) * n), where *p* = 90 and *n* = 14 *i* = (90 / 100) * 14 = 12.6   The index *i* is not an integer, we need to round up the index (i = 13) ⇒ the 90^th^ percentile is the value in 13^th^ position, or 4511

But in the report, it is raking 12th position or 2920 as 90% value

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