WebPageTest results

Summary

First view Repeat view
Page Speed index First byte Start render Load Bytes Requests Connections Speed index Load
Times are in milliseconds and are the median values from 9 runs in WebPageTest. The test location was Dulles, the connection was Native Connection and the browser was Chrome. All measurements were taken between 08:26:53 and 08:26:59 on Thursday, June 18, 2015.
20150618-081703-01-nature-homepage 1,623 289 1,593 3,104 409,663 61 32 997 3,010
2014-7-7-0-homepage 1,214 280 1,289 2,502 398,754 46 30 1,742
20150618-081703-02-sciam-homepage 4,785 301 2,190 11,328 1,906,645 153 55 2,230 6,684
2014-7-7-2-scientific-american homepage 3,717 310 2,197 8,670 1,789,249 121 38 4,046
20150618-081703-03-nature-jobs 4,792 422 4,694 7,823 1,133,288 119 39 1,884 4,476
2014-7-7-3-nature-jobs 3,863 791 3,792 6,807 955,300 65 26 2,665
20150618-081703-04-aip-article 7,613 936 2,993 14,953 2,390,043 187 49 2,135 3,654
2014-7-7-7-aip-article 8,366 1,135 7,586 13,370 2,134,577 142 25 2,852
20150618-081703-05-maestro-article 3,493 842 2,693 13,449 2,283,283 84 40 1,661 2,503
2014-7-7-9-maestro-article 4,088 560 3,591 5,779 925,327 44 20 1,798
20150618-081703-06-polopoly-article 4,345 197 3,891 10,111 1,662,297 93 39 1,076 1,993
2014-7-7-8-polopoly-article 5,275 186 4,793 9,076 1,673,563 72 32 2,563

Care should be taken when making comparisons between the figures for different pages, since each page contains a different amount of data and requires a different amount of work. Nonetheless, some comparisons can be made.

Charts

Speed index, first view

Speed index, first view 2014-7-7-0-homepage 1,214 2014-7-7-0-homepage 20150618-081703-01-nature-homepage 1,623 20150618-081703-01-nature-homepage 20150618-081703-05-maestro-article 3,493 20150618-081703-05-maestro-article 2014-7-7-2-scientific-american homepage 3,717 2014-7-7-2-scientific-american homepage 2014-7-7-3-nature-jobs 3,863 2014-7-7-3-nature-jobs 2014-7-7-9-maestro-article 4,088 2014-7-7-9-maestro-article 20150618-081703-06-polopoly-article 4,345 20150618-081703-06-polopoly-article 20150618-081703-02-sciam-homepage 4,785 20150618-081703-02-sciam-homepage 20150618-081703-03-nature-jobs 4,792 20150618-081703-03-nature-jobs 2014-7-7-8-polopoly-article 5,275 2014-7-7-8-polopoly-article 20150618-081703-04-aip-article 7,613 20150618-081703-04-aip-article 2014-7-7-7-aip-article 8,366 2014-7-7-7-aip-article First-view speed index (lower is better) Speed index, first view as RTTs 2014-7-7-0-homepage 24 2014-7-7-0-homepage 20150618-081703-01-nature-homepage 28 20150618-081703-01-nature-homepage 20150618-081703-05-maestro-article 64 20150618-081703-05-maestro-article 2014-7-7-2-scientific-american homepage 66 2014-7-7-2-scientific-american homepage 2014-7-7-9-maestro-article 75 2014-7-7-9-maestro-article 2014-7-7-3-nature-jobs 76 2014-7-7-3-nature-jobs 20150618-081703-06-polopoly-article 79 20150618-081703-06-polopoly-article 20150618-081703-03-nature-jobs 83 20150618-081703-03-nature-jobs 20150618-081703-02-sciam-homepage 86 20150618-081703-02-sciam-homepage 2014-7-7-8-polopoly-article 104 2014-7-7-8-polopoly-article 20150618-081703-04-aip-article 105 20150618-081703-04-aip-article 2014-7-7-7-aip-article 153 2014-7-7-7-aip-article First-view speed index as a function of RTT

Speed index, repeat view

Speed index, repeat view 20150618-081703-01-nature-homepage 997 20150618-081703-01-nature-homepage 20150618-081703-06-polopoly-article 1,076 20150618-081703-06-polopoly-article 20150618-081703-05-maestro-article 1,661 20150618-081703-05-maestro-article 20150618-081703-03-nature-jobs 1,884 20150618-081703-03-nature-jobs 20150618-081703-04-aip-article 2,135 20150618-081703-04-aip-article 20150618-081703-02-sciam-homepage 2,230 20150618-081703-02-sciam-homepage Repeat-view speed index (lower is better) Speed index, repeat-view improvement 20150618-081703-06-polopoly-article 25% 20150618-081703-06-polopoly-article 20150618-081703-04-aip-article 28% 20150618-081703-04-aip-article 20150618-081703-03-nature-jobs 39% 20150618-081703-03-nature-jobs 20150618-081703-02-sciam-homepage 47% 20150618-081703-02-sciam-homepage 20150618-081703-05-maestro-article 48% 20150618-081703-05-maestro-article 20150618-081703-01-nature-homepage 61% 20150618-081703-01-nature-homepage Repeat-view speed index as a percentage of first-view

First byte

First byte in milliseconds 2014-7-7-8-polopoly-article 186 2014-7-7-8-polopoly-article 20150618-081703-06-polopoly-article 197 20150618-081703-06-polopoly-article 2014-7-7-0-homepage 280 2014-7-7-0-homepage 20150618-081703-01-nature-homepage 289 20150618-081703-01-nature-homepage 20150618-081703-02-sciam-homepage 301 20150618-081703-02-sciam-homepage 2014-7-7-2-scientific-american homepage 310 2014-7-7-2-scientific-american homepage 20150618-081703-03-nature-jobs 422 20150618-081703-03-nature-jobs 2014-7-7-9-maestro-article 560 2014-7-7-9-maestro-article 2014-7-7-3-nature-jobs 791 2014-7-7-3-nature-jobs 20150618-081703-05-maestro-article 842 20150618-081703-05-maestro-article 20150618-081703-04-aip-article 936 20150618-081703-04-aip-article 2014-7-7-7-aip-article 1,135 2014-7-7-7-aip-article Time to first byte (milliseconds) First byte in RTTs 20150618-081703-06-polopoly-article 4 20150618-081703-06-polopoly-article 20150618-081703-01-nature-homepage 5 20150618-081703-01-nature-homepage 20150618-081703-02-sciam-homepage 6 20150618-081703-02-sciam-homepage 2014-7-7-2-scientific-american homepage 6 2014-7-7-2-scientific-american homepage 2014-7-7-0-homepage 6 2014-7-7-0-homepage 20150618-081703-03-nature-jobs 8 20150618-081703-03-nature-jobs 2014-7-7-9-maestro-article 11 2014-7-7-9-maestro-article 20150618-081703-04-aip-article 13 20150618-081703-04-aip-article 20150618-081703-05-maestro-article 16 20150618-081703-05-maestro-article 2014-7-7-3-nature-jobs 16 2014-7-7-3-nature-jobs 2014-7-7-7-aip-article 23 2014-7-7-7-aip-article Time to first byte (RTTs)

Start render, difference from first byte

Start render, difference from first byte in milliseconds 2014-7-7-0-homepage 1,009 2014-7-7-0-homepage 20150618-081703-01-nature-homepage 1,304 20150618-081703-01-nature-homepage 20150618-081703-05-maestro-article 1,851 20150618-081703-05-maestro-article 2014-7-7-2-scientific-american homepage 1,887 2014-7-7-2-scientific-american homepage 20150618-081703-02-sciam-homepage 1,889 20150618-081703-02-sciam-homepage 20150618-081703-04-aip-article 2,057 20150618-081703-04-aip-article 2014-7-7-3-nature-jobs 3,001 2014-7-7-3-nature-jobs 2014-7-7-9-maestro-article 3,031 2014-7-7-9-maestro-article 20150618-081703-06-polopoly-article 3,694 20150618-081703-06-polopoly-article 20150618-081703-03-nature-jobs 4,272 20150618-081703-03-nature-jobs 2014-7-7-8-polopoly-article 4,607 2014-7-7-8-polopoly-article 2014-7-7-7-aip-article 6,451 2014-7-7-7-aip-article Time from first byte until start render (milliseconds) Start render, difference from first byte in RTTs 2014-7-7-0-homepage 19 2014-7-7-0-homepage 20150618-081703-01-nature-homepage 24 20150618-081703-01-nature-homepage 20150618-081703-05-maestro-article 32 20150618-081703-05-maestro-article 20150618-081703-02-sciam-homepage 34 20150618-081703-02-sciam-homepage 2014-7-7-2-scientific-american homepage 35 2014-7-7-2-scientific-american homepage 20150618-081703-04-aip-article 41 20150618-081703-04-aip-article 2014-7-7-3-nature-jobs 59 2014-7-7-3-nature-jobs 2014-7-7-9-maestro-article 60 2014-7-7-9-maestro-article 20150618-081703-06-polopoly-article 65 20150618-081703-06-polopoly-article 20150618-081703-03-nature-jobs 75 20150618-081703-03-nature-jobs 2014-7-7-8-polopoly-article 95 2014-7-7-8-polopoly-article 2014-7-7-7-aip-article 115 2014-7-7-7-aip-article Time from first byte until start render (RTTs)

Load, difference from first byte

Load, difference from first byte in milliseconds 2014-7-7-0-homepage 2,222 2014-7-7-0-homepage 20150618-081703-01-nature-homepage 2,815 20150618-081703-01-nature-homepage 2014-7-7-9-maestro-article 5,219 2014-7-7-9-maestro-article 2014-7-7-3-nature-jobs 6,016 2014-7-7-3-nature-jobs 20150618-081703-03-nature-jobs 7,401 20150618-081703-03-nature-jobs 2014-7-7-2-scientific-american homepage 8,360 2014-7-7-2-scientific-american homepage 2014-7-7-8-polopoly-article 8,890 2014-7-7-8-polopoly-article 20150618-081703-06-polopoly-article 9,914 20150618-081703-06-polopoly-article 20150618-081703-02-sciam-homepage 11,027 20150618-081703-02-sciam-homepage 2014-7-7-7-aip-article 12,235 2014-7-7-7-aip-article 20150618-081703-05-maestro-article 12,607 20150618-081703-05-maestro-article 20150618-081703-04-aip-article 14,017 20150618-081703-04-aip-article Time from first byte until load event (milliseconds) Load, difference from first byte in RTTs 2014-7-7-0-homepage 44 2014-7-7-0-homepage 20150618-081703-01-nature-homepage 48 20150618-081703-01-nature-homepage 2014-7-7-9-maestro-article 95 2014-7-7-9-maestro-article 2014-7-7-3-nature-jobs 118 2014-7-7-3-nature-jobs 20150618-081703-03-nature-jobs 132 20150618-081703-03-nature-jobs 2014-7-7-2-scientific-american homepage 147 2014-7-7-2-scientific-american homepage 20150618-081703-06-polopoly-article 174 20150618-081703-06-polopoly-article 2014-7-7-8-polopoly-article 179 2014-7-7-8-polopoly-article 20150618-081703-02-sciam-homepage 186 20150618-081703-02-sciam-homepage 2014-7-7-7-aip-article 221 2014-7-7-7-aip-article 20150618-081703-05-maestro-article 229 20150618-081703-05-maestro-article 20150618-081703-04-aip-article 255 20150618-081703-04-aip-article Time from first byte until load event (RTTs)

Optimisations

Page First byte Persistent connections GZIP compression Image compression Progressive JPEGs Browser caching Asset CDN
20150618-081703-01-nature-homepage 87% 95% 100% 77% 0% 33% 62%
2014-7-7-0-homepage 92% 93% 100% 59% 45% 32% 66%
20150618-081703-02-sciam-homepage 86% 98% 100% 29% 0% 66% 87%
2014-7-7-2-scientific-american homepage 85% 96% 99% 100% 0% 71% 88%
20150618-081703-03-nature-jobs 83% 98% 98% 17% 44% 26% 85%
2014-7-7-3-nature-jobs 35% 96% 97% 24% 86% 28% 84%
20150618-081703-04-aip-article 28% 97% 98% 30% 0% 13% 87%
2014-7-7-7-aip-article 0% 98% 100% 30% 2% 8% 91%
20150618-081703-05-maestro-article 24% 97% 100% 22% 2% 51% 66%
2014-7-7-9-maestro-article 60% 94% 100% 64% 18% 62% 75%
20150618-081703-06-polopoly-article 98% 97% 100% 43% 0% 70% 73%
2014-7-7-8-polopoly-article 95% 95% 93% 43% 0% 71% 75%