London web performance WPO Lessons from the field June 2013
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Web Performance - random lessons learnt from delivering WPO, Load testing and APM consulting in the UK. PLus a bit about WebPageTest Private Instances etc
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London web performance WPO Lessons from the field June 2013
- 1. CloudOpsGuys Your Software | Our Service TM 1 CloudOpsGuys Your Software | Our Service TM WPO – Lessons from the Field
- 2. CloudOpsGuys Your Software | Our Service TM (1) Some quick & dirty ways to do a WPO PoC using automation (2) 5 reasons why having your own WebPageTest instance rocks! (3) The most common WPO mistakes I see (time and time again) (4) Why I love APM tools and you're nuts if you don't use one! Agenda 3
- 3. CloudOpsGuys Your Software | Our Service TM PoC - Do a quick example video • There are two easy ways to get a rough before/after web optimisation video • Using WebPageTest Compare – http://www.webpagetest.org/compare • Use PageSpeedInsights – https://developers.google.com/speed/pagespeed/in sights – (yes, I know one uses the other!)
- 4. CloudOpsGuys Your Software | Our Service TM Pagespeed Insights
- 5. CloudOpsGuys Your Software | Our Service TM And you can watch a video https://developers.google.com/speed/pagespeed/insights#url=http_3A_2F_2Fwww.marksandspencer.com_2FFormal -Shirts-Shirts-Mens_2Fb_2F2559784031_3Fie_3DUTF8_26intid_3Dgnav__men__formal-shirts&mobile=false
- 6. CloudOpsGuys Your Software | Our Service TM WPT Compare
- 7. CloudOpsGuys Your Software | Our Service TM Page Speed Service
- 8. CloudOpsGuys Your Software | Our Service TM Build your own • I’ve been building my own PoC tool using Riverbed Stingray Aptimizer and aiCache.com • Cache static and dynamic optimise resources • Just use CNAMES and some header re- writing to glue it together Browser aiCache Dynamic Stingray Aptimizer Origin Server
- 9. CloudOpsGuys Your Software | Our Service TM Some gotchas… • Multiple levels of caching – Browser cache – aiCache – Aptimizer cache (optimized static objects) • Making sure that you send the right headers at each “hop” – Right user-agent – Right hostname – Right GZIP / Deflate headers… • FQDN names in source (particularly in top/side nav) – FFS what’s wrong with a relative /link?
- 10. CloudOpsGuys Your Software | Our Service TM Other lessons • Load time is useless • Render start is useless • Filmstrip, Video or “Visual Progress” is KEY – More on this later…
- 11. CloudOpsGuys Your Software | Our Service TM Video example
- 12. CloudOpsGuys Your Software | Our Service TM 5 reasons why WPT Private instance rocks! 1. NO QUEUE! 2. Bulk Testing Mode 3. It’s private 4. It’s inside your firewall 5. Easier access to history of testing 6. You will learn more about features! 1. Visual Progress 2. Connection View 3. Scripting etc etc
- 13. CloudOpsGuys Your Software | Our Service TM Bulk Testing!
- 14. CloudOpsGuys Your Software | Our Service TM Give it a list of URL’s
- 15. CloudOpsGuys Your Software | Our Service TM Visual Progress – KEY!
- 16. CloudOpsGuys Your Software | Our Service TM Connection view Relatively good…
- 17. CloudOpsGuys Your Software | Our Service TM Connection view Relatively bad… connection resets after 2 requests…
- 18. CloudOpsGuys Your Software | Our Service TM LESSON LEARNT FROM CONSULTING What I see day in, day out…
- 19. CloudOpsGuys Your Software | Our Service TM Lessons learnt from consulting… 20/06/2013 19 Generic Description Reduce Page Size Reduce Number of Requests Implement GZIP Compression Optimise Loading of external files Defer JavaScript loading Optimise images Optimize HTTP Caching Domain Sharding Cookie- free Domains Back-end performance tuning Remove Unnecessary CSS High Street Retailer Yes Yes No No No No Yes No Yes No Yes Budget Hotel Chain No Yes No No No Yes Yes Yes Yes Yes No Professional Body No Yes Yes Yes Yes Yes Yes Yes No Yes No High Street Retailer No Yes No Yes Yes Yes Yes Yes Yes Yes No VOD provider No Yes No No Yes Yes Yes Yes Yes Yes Yes Consumer Electronics Brand Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Fashion Retailer No Yes No No Yes Yes Yes No Yes Yes Yes Travel Sector No Yes Yes Yes Yes no Yes Yes Yes Yes No Fashion Retailer Yes Yes Yes Yes Yes No Yes Yes No Yes No Fashion Retailer Yes Yes No No Yes No Yes Yes Yes Yes No Home Improvement Retail No Yes No No Yes No Yes Yes Yes Yes Yes Electrical Retailer Yes Yes no Yes Yes No Yes No Yes Yes No Electrical Retailer Yes Yes No No Yes Yes Yes Yes No Yes No Online Gambling Yes Yes Yes Yes No Yes Yes No Yes Yes Yes Mobile Phone Retailer Yes Yes No Yes Yes Yes Yes Yes Yes No Yes Insurance Provider No Yes No No Yes No Yes Yes No Yes Yes Emergency Repair Service No Yes No Yes No Yes Yes Yes No Yes Yes Mobile Phone Retailer Yes Yes No Yes Yes Yes Yes Yes No Yes Yes Car Manufacturer No Yes No No No Yes Yes Yes Yes Yes Yes Financial Services No Yes Yes No Yes No Yes Yes No Yes Yes Travel Sector Yes Yes No No Yes No Yes Yes No No No Publisher No Yes Yes No Yes Yes Yes Yes No No Yes Publisher No Yes No No Yes No Yes Yes Yes No Yes High Street Retailer Yes Yes No Yes Yes Yes Yes Yes No No Yes Newspaper Yes Yes No Yes Yes Yes Yes No Yes Yes Yes 48% 100% 28% 48% 80% 60% 100% 80% 60% 76% 64%
- 20. CloudOpsGuys Your Software | Our Service TM20/06/2013 20 Performance Rule Frequency Recommended Reduce Number of Requests 100% Optimize HTTP Caching 100% Defer JavaScript loading 80% Domain Sharding 80% -Back end performance tuning 76% Remove Unnecessary CSS 64% Optimise images 60% -Cookie free Domains 60% Reduce Page Size 48% Optimise Loading of external files 48% Implement GZIP Compression 28%
- 21. CloudOpsGuys Your Software | Our Service TM What else? • It takes ages for anything to change – (hence why I am focussing on automation stuff) • Video’s are a killer tool • Analysis of synthetic monitoring can tell you an lot about back-end performance • Use analogies (I wrote a whole whitepaper using shopping at Tesco as an analogy for web performance…)
- 22. CloudOpsGuys Your Software | Our Service TM WHY I LOVE APM TOOLS… Deeper insights into back-end performance…
- 23. CloudOpsGuys Your Software | Our Service TM 4 quick examples • Know your dependencies! – And don’t assume it’s your code that sucks… • You can focus on application transactions • How many transactions to load a page? – And why ORM’s can suck… • And classic Application metrics – “The heap is doing WHAT?”
- 24. CloudOpsGuys Your Software | Our Service TM Know your dependencies
- 25. CloudOpsGuys Your Software | Our Service TM Focus on Application Transactions
- 26. CloudOpsGuys Your Software | Our Service TM How many calls? Query Avg. Time (ms) Count Tot. Time (ms) % Time server=83.231.201.82;database=e6-goshcc;uid=e6- goshcc;pwd=<snip> 0.26 1542 408 1.6 ESModule_EShop_SelectPrice 6.9 1216 8387 32.8 ESModule_EShop_SelectOrderItems 7.43 394 2929 11.5 ESCore_Lookup_Countries_Select 9.4 391 3676 14.4 ESModule_EShop_SelectAddress 10.15 285 2893 11.3 ESCore_Admin_LoadUserDetails 15.62 86 1343 5.3 ESModule_EShop_SelectOrderLineExtendedRecord 15.69 65 1020 4 ESCore_Data_GetNavigation 27.89 9 251 1 ESCore_Data_GetObjectDetails 3.44 9 31 0.1 ESCore_Data_IsObjectChildOfObject 0 8 0 0
- 27. CloudOpsGuys Your Software | Our Service TM I think you have a memory leak
- 28. CloudOpsGuys Your Software | Our Service TM Bonus question! Something unusual? • GET /HTTP/1.1 • Host: www.cloudopsguys.com • Connection: keep-alive • Accept: text/html,application/xhtml+xml,application/xml;q=0. 9,*/*;q=0.8 • User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.110 Safari/537.36 PTST/101 • Accept-Encoding: gzip,deflate,sdch • Accept-Language: en-GB,en-US;q=0.8,en;q=0.6
- 29. CloudOpsGuys Your Software | Our Service TM Bonus question! Something unusual? • GET /HTTP/1.1 • Host: www.cloudopsguys.com • Connection: keep-alive • Accept: text/html,application/xhtml+xml,application/xml;q=0. 9,*/*;q=0.8 • User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.110 Safari/537.36 PTST/101 • Accept-Encoding: gzip,deflate,sdch • Accept-Language: en-GB,en-US;q=0.8,en;q=0.6
- 30. CloudOpsGuys Your Software | Our Service TM Shared Dictionary Compression over HTTP
- 31. CloudOpsGuys Your Software | Our Service TM THANKYOU www.cloudopsguys.com CloudOpsGuys Your Software | Our Service TM 20
- 32. CloudOpsGuys Your Software | Our Service TM Get in Touch www.CloudOpsGuys.com 0208 798 3079info@cloudopsguys.com twitter.com/cloudopsguys facebook.com/cloudopsguysskype: cloudopsguys plus.google.com/cloudopsguys Social Media Social Media
Notes de l'éditeur
- Based on 25 consulting reports across a wide range of e-commerce and publishing sites
- 100% of the time there were too many requests100% of the time they weren’t using caching to its full advantage, and hence repeat visits were slower than they needed to be…76% of the sites exhibited noticable slowing down during peak time of day/week~50% of the time the pages were bloated (often due to images that on average can be optimised ~15%) Frighteningly ¼ of the sites analysed either didn’t have Gzip compression enabled or it had problems e.g. failing under load!