Introducing Jiffy

Jiffy: Real-World Performance Measurement Scott Ruthﬁeld, WhitePages.com scott@whitepages.com

WhitePages.com Wikipedia: Rotary Phone

People Search Power

Numbers >2,000,000,000 searches/year ~500 searches/second

Very Important Performance Lesson! Slow is Bad. We’re Slow. Flickr: Just Taken Pics

How Slow?

It Ain’t Us. Text

Then What Is It?

Reﬂection • YSMV • YCMWYCM

Let’s look at that again

Introducing Jiffy • Jiffy (n.) - Small unit of time; tick between system clock interrupts • End-to-end system for measuring and reporting on page load activity

Real Data at Scale Flickr: smokingpermitted

Measure Anything

Real/Near Time Reporting Flickr: mrbill

~0 Impact on Page Perf (It works)

Jiffy Components • Jiffy.js - library for instrumenting your pages and reporting measurements • Apache (httpd.conf) conﬁg - receive and log measurements • Ingestor - parse logs and store in any DB • Database schema and rollup scripts • Reporting toolset • Firebug Plugin

Jiffy: Mark & Measure • Mark - start timing from this point • Measure - report elapsed time since mark • One Mark::Many Measures

Simple Sample Input Jiffy.mark(”slowThirdPartyStartquot;); <script src=quot;http://js.slowthirdparty.com/fooquot;></ script> Jiffy.measure(”slowThirdPartyDonequot;, ”slowThirdPartyStartquot;); Output http://yoursite.com/rx? ets=slowThirdPartyDone:567& uid=[sesnGUID]&st=[startTime]&pn=[pageName]

Sample Report

Misc • Immediate or batch submits • Default browser event measurements BROWSER_EVENTS: {quot;unloadquot;:window,quot;loadquot;:window}

Firebug Plugin Bill Scott @ Netﬂix

Available Today • code.whitepages.com - project link + slides • Open Source, Apache 2.0 License • Still a lot to do! • More database support • Automated conﬁguration • Auto-timeout tools

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Introducing Jiffy

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