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function _et_vm_ct()n{ntntreturn true;n}ntnfunction
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ETVMRecorder)nttetVM.restartRecor...
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default-src 'none';
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What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
What Are Third-party Components Doing to Your Site?
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What Are Third-party Components Doing to Your Site?

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We increasingly rely on third-party scripts to deliver some of the business-critical features of our sites – analytics, adverts, multi-variant testing, comments, recommendations, retargeting, social sharing etc.

Often these scripts get added with the seemingly innocent “it’s just a snippet of JavaScript,” but they can have a dramatic impact on performance, from slowing the page down to completely breaking it when a third party has availability issues.

Despite this explosion in third-party components there’s little information on the value they deliver, how they interact with our sites, and what their impact on performance is.

In this session we’ll share the insights we’ve gained from analysing the impact third-party scripts are having on performance of the sites we monitor, the value they deliver, and how our clients manage them.

We’ll look at which third parties are the most popular, how they interact with our pages, and how consistent their performance is.

Attendees will come away with a better understanding of third-party performance, and pointers to how to make informed decisions when choosing third parties.

Published in: Software, Internet, Technology
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What Are Third-party Components Doing to Your Site?

  1. 1. 0.00% 0.50% 1.00% 1.50% 2.00% 2.50% Speed Index Percentage Tests With AB Percentage Tests Without AB
  2. 2. function _et_vm_ct()n{ntntreturn true;n}ntnfunction et_vm_reload()n{ntif(etVM instanceof ETVMRecorder)nttetVM.restartRecorder();n}ntnetVM x3d new ETVMRecorder(x27t9boHVx27, x27www.etracker.de/vmx27, 0);var et_optInActive x3d false;nvar et_doEvents x3d false;nnfunction et_getDeliveryHash()n{ntreturn x27dYKEZ5wR3amdR8e2fXsGrgx3dx3dx27;n}nnfunction et_escape(param)n{ntreturn encodeURIComponent(param);n}nnfunction et_console(message)n{ntif(typeof(console) !x3d x27undefinedx27 x26x26 typeof(console) !x3d x27unknownx27)nt{nttconsole.log(message);nt}n}nnfunction et_debug(param)n{tn}nnfunction et_addEvent(e, t, f, u) n{ntif (e.addEventListener) {ntte.addEventListener(t, f, u);nttreturn 1;nt}ntelse if (e.attachEvent) {nttvar r x3d e.attachEvent(x27onx27 + t, f);nttreturn r;nt}ntelse ntte[x27onx27 + t] x3d f;n}nnfunction et_random(value)n{ntif(value x3ex3d Math.round(Math.random()*100))nttreturn true;ntelsenttreturn
  3. 3. function _et_vm_ct()n{ntntreturn true;n}ntnfunction et_vm_reload()n{ntif(etVM instanceof ETVMRecorder)nttetVM.restartRecorder();n}ntnetVM x3d new ETVMRecorder(x27t9boHVx27, x27www.etracker.de/vmx27, 0);var et_optInActive x3d false;nvar et_doEvents x3d false;nnfunction et_getDeliveryHash()n{ntreturn x27dYKEZ5wR3amdR8e2fXsGrgx3dx3dx27;n}nnfunction et_escape(param)n{ntreturn encodeURIComponent(param);n}nnfunction et_console(message)n{ntif(typeof(console) !x3d x27undefinedx27 x26x26 typeof(console) !x3d x27unknownx27)nt{nttconsole.log(message);nt}n}nnfunction et_debug(param)n{tn}nnfunction et_addEvent(e, t, f, u) n{ntif (e.addEventListener) {ntte.addEventListener(t, f, u);nttreturn 1;nt}ntelse if (e.attachEvent) {nttvar r x3d e.attachEvent(x27onx27 + t, f);nttreturn r;nt}ntelse ntte[x27onx27 + t] x3d f;n}nnfunction et_random(value)n{ntif(value x3ex3d Math.round(Math.random()*100))nttreturn true;ntelsenttreturn
  4. 4. Content-Security-Policy: " default-src 'none'; script-src 'self' https://www.google-analytics.com; connect-src 'self'; img-src 'self' images.example.com; style-src 'self'; "
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