Bug ID 542581: WebSafe alerts with HTML attached cause the page to run slowly

Last Modified: Dec 20, 2018

Bug Tracker

Affected Product:  See more info
BIG-IP FPS(all modules)

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4

Fixed In:
11.6.1

Opened: Aug 31, 2015
Severity: 3-Major

Symptoms

When 'Attach HTML to alerts' is enabled, large webpages might run slowly.

Impact

Page may experience a noticeable delay in reacting to user actions.

Conditions

-- 'Attach HTML to alerts' is enabled. -- Page source is large. -- WebSafe alert is sent. -- Using Microsoft Internet Explorer version 8 (IE8) or earlier browser version.

Workaround

Disable 'Attach HTML to alerts'. Use beforeloadfunction to disable only on IE8: function(c){ function isOldIE(ver) { var ua = navigator.userAgent.toLowerCase(); return (ua.indexOf('msie') > -1) ? parseInt(ua.split('msie')[1]) <= ver : false; } if (isOldIE(8)) { c.A.B.P = false; } }

Fix Information

HTML encoding for WebSafe alerts is now faster and can be configured to send only a section of the page source.

Behavior Change