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timeToFirstByte: fix race condition #298

Closed
jimaek opened this issue May 5, 2014 · 4 comments
Closed

timeToFirstByte: fix race condition #298

jimaek opened this issue May 5, 2014 · 4 comments
Assignees
@macbre
Labels
bug
Milestone
v1.2

Comments

@jimaek
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jimaek commented May 5, 2014

When testing rackspace.com for some reason timeToFirstByte is 0.
Any ideas why?

phantomas -V
phantomas v1.1.0
phantomas http://www.rackspace.com/

phantomas v1.1.0 metrics for <http://www.rackspace.com/>:

* requests: 41
* gzipRequests: 7
* postRequests: 0
* httpsRequests: 1
* notFound: 0
* timeToFirstByte: 0
* timeToLastByte: 47
* bodySize: 576259
* contentLength: 576259
* httpTrafficCompleted: 1531
* ajaxRequests: 0
* htmlCount: 2
* htmlSize: 11718
* cssCount: 2
* cssSize: 307338
* jsCount: 7
* jsSize: 177652
* jsonCount: 0
* jsonSize: 0
* imageCount: 26
* imageSize: 79547
* webfontCount: 0
* webfontSize: 0
* base64Count: 2
* base64Size: 440
* otherCount: 4
* otherSize: 4
* cacheHits: 0
* cacheMisses: 0
* cachePasses: 0
* cachingNotSpecified: 3
* cachingTooShort: 29
* cachingDisabled: 1
* oldCachingHeaders: 37
* consoleMessages: 0
* domains: 10
* maxRequestsPerDomain: 25
* medianRequestsPerDomain: 1
* DOMqueries: 12
* DOMqueriesById: 1
* DOMqueriesByClassName: 0
* DOMqueriesByTagName: 10
* DOMqueriesByQuerySelectorAll: 1
* DOMinserts: 14
* DOMqueriesDuplicated: 2
* eventsBound: 1
* globalVariables: 710
* globalVariablesFalsy: 30
* headersCount: 554
* headersSentCount: 122
* headersRecvCount: 432
* headersSize: 21158
* headersSentSize: 4523
* headersRecvSize: 16635
* headersBiggerThanContent: 8
* documentWriteCalls: 5
* evalCalls: 1
* jQueryVersion: 1.5.2
* jQueryOnDOMReadyFunctions: 0
* jQuerySizzleCalls: 0
* jsErrors: 9
* redirects: 1
* redirectsTime: 195
* assetsNotGzipped: 4
* assetsWithQueryString: 7
* smallImages: 16
* multipleRequests: 0
* timeToFirstCss: 522
* timeToFirstJs: 430
* timeToFirstImage: 779
* onDOMReadyTime: 925
* onDOMReadyTimeEnd: 927
* windowOnLoadTime: 1172
* windowOnLoadTimeEnd: 1174
* timeBackend: 0
* timeFrontend: 100
* statusCodesTrail:
* windowAlerts: 0
* windowConfirms: 0
* windowPrompts: 0
* cookiesSent: 0
* cookiesRecv: 1357
* domainsWithCookies: 5
* documentCookiesLength: 224
* documentCookiesCount: 7
* bodyHTMLSize: 33878
* commentsSize: 138
* hiddenContentSize: 1
* whiteSpacesSize: 96
* DOMelementsCount: 18
* DOMelementMaxDepth: 5
* nodesWithInlineCSS: 1
* localStorageEntries: 0
* smallestResponse: 0
* biggestResponse: 258218
* fastestResponse: 17
* slowestResponse: 439
* smallestLatency: 0
* biggestLatency: 0
* medianResponse: 123
* medianLatency: 122

Offenders for otherCount (4):
 * http://script/mbox.js (0.00 kB)
 * http://1055.ic-live.com/goat.php?cID=1055&cdid=4677&campID=8&ic_cat=&ic_type=&ic_bu=&ic_bc=&ic_ch=&ic_nso=&altid=US0a2563d9951d22310ee54c6facabb342&refVar= (0.00 kB)
 * http://1055.ic-live.com/goat.php?cID=1055&cdid=4677&campID=8&ic_cat=&ic_type=&ic_bu=&ic_bc=&ic_ch=&ic_nso=&altid=US0a2563d9951d22310ee54c6facabb342&refVar=&ic_cc=1&ic_old_pid=ac122470-3f01-46a6-a563-7370a3d44b2c&ic_old_sid=ac122470-3f01-46a6-a563-7370a3d41055 (0.00 kB)
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513 (0.00 kB)

Offenders for jsCount (7):
 * http://www.google.com/jsapi (12.83 kB)
 * http://www.rackspace.com/script/analytics/?environment=production&businessunit=rackspace&rackuid=US0a2563d9951d22310ee54c6facabb342&language=en (0.39 kB)
 * http://libs.coremetrics.com/eluminate.js (105.29 kB)
 * http://597fbcfa4a3865fb3530-f60a0bb748a3c84145bb10da7563bafb.r83.cf1.rackcdn.com/oncue.js (0.42 kB)
 * http://www.rackspace.com/min/?g=js-header&1398982199 (47.64 kB)
 * http://cbi.boldchat.com/aid/181086145682362661/bc.cbhs?wdid=3585965807641389340&rdid=493576000255290256 (0.11 kB)
 * http://www.rackspace.com/min/?f=script/analytics/addtags.js (6.80 kB)

Offenders for oldCachingHeaders (37):
 * http://www.google.com/jsapi - Expires: Mon, 05 May 2014 21:05:13 GMT
 * http://www.rackspace.com/ - Expires: Thu, 19 Nov 1981 08:52:00 GMT
 * http://www.rackspace.com/ - Pragma: no-cache
 * http://www.rackspace.com/min/?f=css/managed.rackspace.css - Expires: Mon, 05 May 2014 21:35:13 GMT
 * http://597fbcfa4a3865fb3530-f60a0bb748a3c84145bb10da7563bafb.r83.cf1.rackcdn.com/oncue.js - Expires: Thu, 08 May 2014 02:40:48 GMT
 * http://www.rackspace.com/min/?g=js-header&1398982199 - Expires: Tue, 05 May 2015 21:05:13 GMT
 * http://www.rackspace.com/min/?g=css&1398982199 - Expires: Tue, 05 May 2015 21:05:13 GMT
 * http://images.cdn.rackspace.com/home/v4/managed-hosting-icon.png - Expires: Mon, 05 May 2014 21:36:39 GMT
 * http://images.cdn.rackspace.com/home/v4/gdgt-logo.png - Expires: Mon, 05 May 2014 21:30:56 GMT
 * http://images.cdn.rackspace.com/home/v4/dominos-logo.png - Expires: Mon, 05 May 2014 21:32:48 GMT
 * http://images.cdn.rackspace.com/home/v4/private-cloud-icon.png - Expires: Mon, 05 May 2014 21:39:17 GMT
 * http://images.cdn.rackspace.com/home/v4/public-cloud-icon.png - Expires: Mon, 05 May 2014 21:13:39 GMT
 * http://images.cdn.rackspace.com/home/v4/simon-properties-logo.png - Expires: Mon, 05 May 2014 21:52:32 GMT
 * http://images.cdn.rackspace.com/home/v4/hubspot-logo.png - Expires: Mon, 05 May 2014 21:23:03 GMT
 * http://images.cdn.rackspace.com/home/v4/vevo-logo.png - Expires: Mon, 05 May 2014 21:15:46 GMT
 * http://images.cdn.rackspace.com/home/v4/snappaged-logo.png - Expires: Mon, 05 May 2014 21:18:25 GMT
 * http://images.cdn.rackspace.com/home/v4/hybrid-overview.png - Expires: Mon, 05 May 2014 21:42:00 GMT
 * http://images.cdn.rackspace.com/home/v4/support-overview.png - Expires: Mon, 05 May 2014 21:44:30 GMT
 * http://images.cdn.rackspace.com/home/v4/powered-by-openstack.png - Expires: Mon, 05 May 2014 21:19:04 GMT
 * http://images.cdn.rackspace.com/footer/rug/wevegotyourback-24x7x365.png - Expires: Mon, 05 May 2014 21:27:27 GMT
 * http://images.cdn.rackspace.com/footer/basement/rackerpowered-logo.png - Expires: Mon, 05 May 2014 21:42:01 GMT
 * http://cbi.boldchat.com/aid/181086145682362661/bc.cbhs?wdid=3585965807641389340&rdid=493576000255290256 - Pragma: no-cache
 * http://cbi.boldchat.com/aid/181086145682362661/bc.cbhs?wdid=3585965807641389340&rdid=493576000255290256 - Expires: Thu, 01 Jan 1970 00:00:00 GMT
 * http://images.cdn.rackspace.com/IS/chatslider/background_en.png - Expires: Mon, 05 May 2014 21:14:20 GMT
 * http://images.cdn.rackspace.com/IS/chatslider/smartbutton/available_en.gif - Expires: Mon, 05 May 2014 21:36:00 GMT
 * http://images.cdn.rackspace.com/IS/chatslider/close_en.png - Expires: Mon, 05 May 2014 21:49:11 GMT
 * http://images.cdn.rackspace.com/sprites/global_header-alt.png - Expires: Mon, 05 May 2014 21:54:30 GMT
 * http://images.cdn.rackspace.com/elements/arrow-pocketbutton_dropdown.png - Expires: Mon, 05 May 2014 21:52:21 GMT
 * http://images.cdn.rackspace.com/sprites/global_flags.png - Expires: Mon, 05 May 2014 21:39:16 GMT
 * http://images.cdn.rackspace.com/header/rackspace-logo-nav-173x51.png - Expires: Mon, 05 May 2014 21:36:02 GMT
 * http://images.cdn.rackspace.com/elements/button-arrow-white.png - Expires: Mon, 05 May 2014 21:46:37 GMT
 * http://images.cdn.rackspace.com/footer/rug/callus-icon.png - Expires: Mon, 05 May 2014 21:55:16 GMT
 * http://images.cdn.rackspace.com/footer/rug/chatwithus-icon.png - Expires: Mon, 05 May 2014 21:28:56 GMT
 * http://images.cdn.rackspace.com/footer/rug/emailus-icon.png - Expires: Mon, 05 May 2014 21:34:00 GMT
 * http://www.rackspace.com/min/?f=script/analytics/addtags.js - Expires: Mon, 05 May 2014 21:35:13 GMT
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513&cvdone=p - Expires: Mon, 05 May 2014 03:05:14 GMT
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513&cvdone=p - Pragma: no-cache

Offenders for cachingTooShort (29):
 * http://www.google.com/jsapi cached for 3600 s
 * http://www.rackspace.com/min/?f=css/managed.rackspace.css cached for 1800 s
 * http://597fbcfa4a3865fb3530-f60a0bb748a3c84145bb10da7563bafb.r83.cf1.rackcdn.com/oncue.js cached for 192935 s
 * http://images.cdn.rackspace.com/home/v4/managed-hosting-icon.png cached for 1886 s
 * http://images.cdn.rackspace.com/home/v4/gdgt-logo.png cached for 1543 s
 * http://images.cdn.rackspace.com/home/v4/dominos-logo.png cached for 1655 s
 * http://images.cdn.rackspace.com/home/v4/private-cloud-icon.png cached for 2044 s
 * http://images.cdn.rackspace.com/home/v4/public-cloud-icon.png cached for 506 s
 * http://images.cdn.rackspace.com/home/v4/simon-properties-logo.png cached for 2839 s
 * http://images.cdn.rackspace.com/home/v4/hubspot-logo.png cached for 1070 s
 * http://images.cdn.rackspace.com/home/v4/vevo-logo.png cached for 633 s
 * http://images.cdn.rackspace.com/home/v4/snappaged-logo.png cached for 792 s
 * http://images.cdn.rackspace.com/home/v4/hybrid-overview.png cached for 2207 s
 * http://images.cdn.rackspace.com/home/v4/support-overview.png cached for 2357 s
 * http://images.cdn.rackspace.com/home/v4/powered-by-openstack.png cached for 831 s
 * http://images.cdn.rackspace.com/footer/rug/wevegotyourback-24x7x365.png cached for 1334 s
 * http://images.cdn.rackspace.com/footer/basement/rackerpowered-logo.png cached for 2208 s
 * http://images.cdn.rackspace.com/IS/chatslider/background_en.png cached for 547 s
 * http://images.cdn.rackspace.com/IS/chatslider/smartbutton/available_en.gif cached for 1847 s
 * http://images.cdn.rackspace.com/IS/chatslider/close_en.png cached for 2638 s
 * http://images.cdn.rackspace.com/sprites/global_header-alt.png cached for 2957 s
 * http://images.cdn.rackspace.com/elements/arrow-pocketbutton_dropdown.png cached for 2828 s
 * http://images.cdn.rackspace.com/sprites/global_flags.png cached for 2043 s
 * http://images.cdn.rackspace.com/header/rackspace-logo-nav-173x51.png cached for 1849 s
 * http://images.cdn.rackspace.com/elements/button-arrow-white.png cached for 2484 s
 * http://images.cdn.rackspace.com/footer/rug/callus-icon.png cached for 3003 s
 * http://images.cdn.rackspace.com/footer/rug/chatwithus-icon.png cached for 1423 s
 * http://images.cdn.rackspace.com/footer/rug/emailus-icon.png cached for 1727 s
 * http://www.rackspace.com/min/?f=script/analytics/addtags.js cached for 1800 s

Offenders for assetsNotGzipped (4):
 * http://www.google.com/jsapi (JS)
 * http://www.rackspace.com/ (HTML)
 * http://www.rackspace.com/script/analytics/?environment=production&businessunit=rackspace&rackuid=US0a2563d9951d22310ee54c6facabb342&language=en (JS)
 * http://cbi.boldchat.com/aid/181086145682362661/bc.cbhs?wdid=3585965807641389340&rdid=493576000255290256 (JS)

Offenders for timeToFirstJs (430):
 * http://www.google.com/jsapi received in 430 ms

Offenders for htmlCount (2):
 * http://www.rackspace.com/ (11.44 kB)
 * https://bs.serving-sys.com/BurstingPipe/ActivityServer.bs?cn=as&ActivityID=97068&rnd=676923.1935031712 (0.00 kB)

Offenders for cachingNotSpecified (3):
 * http://www.rackspace.com/script/analytics/?environment=production&businessunit=rackspace&rackuid=US0a2563d9951d22310ee54c6facabb342&language=en
 * http://libs.coremetrics.com/eluminate.js
 * http://cbi.boldchat.com/aid/181086145682362661/bc.cbhs?wdid=3585965807641389340&rdid=493576000255290256

Offenders for assetsWithQueryString (7):
 * http://www.rackspace.com/script/analytics/?environment=production&businessunit=rackspace&rackuid=US0a2563d9951d22310ee54c6facabb342&language=en (JS)
 * http://www.rackspace.com/min/?f=css/managed.rackspace.css (CSS)
 * http://www.rackspace.com/min/?g=js-header&1398982199 (JS)
 * http://www.rackspace.com/min/?g=css&1398982199 (CSS)
 * http://cbi.boldchat.com/aid/181086145682362661/bc.cbhs?wdid=3585965807641389340&rdid=493576000255290256 (JS)
 * http://www.rackspace.com/min/?f=script/analytics/addtags.js (JS)
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513&cvdone=p (IMAGE)

Offenders for cssCount (2):
 * http://www.rackspace.com/min/?f=css/managed.rackspace.css (47.97 kB)
 * http://www.rackspace.com/min/?g=css&1398982199 (252.17 kB)

Offenders for timeToFirstCss (522):
 * http://www.rackspace.com/min/?f=css/managed.rackspace.css received in 522 ms

Offenders for jsErrors (9):
 * TypeError: '[object Object]' is not a valid argument for 'instanceof' (evaluating 'node instanceof Node') - getDOMPath(): /usr/lib/node_modules/phantomas/core/scope.js @ 229 / appendSpy(): phantomjs://webpage.evaluate() @ 56 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 201 / unknown fn: http://www.rackspace.com/ @ 140 / unknown fn: http://www.rackspace.com/ @ 140 / unknown fn: http://www.rackspace.com/ @ 140
 * TypeError: '[object Object]' is not a valid argument for 'instanceof' (evaluating 'node instanceof Node') - getDOMPath(): /usr/lib/node_modules/phantomas/core/scope.js @ 229 / appendSpy(): phantomjs://webpage.evaluate() @ 56 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 201 / unknown fn: http://www.rackspace.com/ @ 169 / unknown fn: http://www.rackspace.com/ @ 170
 * ReferenceError: Can't find variable: mboxCreate - unknown fn: http://www.rackspace.com/ @ 180
 * TypeError: '[object Object]' is not a valid argument for 'instanceof' (evaluating 'node instanceof Node') - getDOMPath(): /usr/lib/node_modules/phantomas/core/scope.js @ 229 / appendSpy(): phantomjs://webpage.evaluate() @ 56 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 201 / unknown fn: http://www.rackspace.com/ @ 570 / unknown fn: http://www.rackspace.com/ @ 571
 * TypeError: '[object Object]' is not a valid argument for 'instanceof' (evaluating 'node instanceof Node') - getDOMPath(): /usr/lib/node_modules/phantomas/core/scope.js @ 229 / appendSpy(): phantomjs://webpage.evaluate() @ 56 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 201 / unknown fn: http://www.rackspace.com/ @ 794 / unknown fn: http://www.rackspace.com/ @ 795
 * TypeError: '[object Object]' is not a valid argument for 'instanceof' (evaluating 'node instanceof Node') - getDOMPath(): /usr/lib/node_modules/phantomas/core/scope.js @ 229 / appendSpy(): phantomjs://webpage.evaluate() @ 56 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 201 / unknown fn: http://597fbcfa4a3865fb3530-f60a0bb748a3c84145bb10da7563bafb.r83.cf1.rackcdn.com/oncue.js @ 13 / unknown fn: http://597fbcfa4a3865fb3530-f60a0bb748a3c84145bb10da7563bafb.r83.cf1.rackcdn.com/oncue.js @ 14
 * TypeError: '[object Object]' is not a valid argument for 'instanceof' (evaluating 'node instanceof Node') - getDOMPath(): /usr/lib/node_modules/phantomas/core/scope.js @ 229 / appendSpy(): phantomjs://webpage.evaluate() @ 56 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 201 / unknown fn: http://www.rackspace.com/ @ 812 / unknown fn: http://www.rackspace.com/ @ 813
 * TypeError: '[object Object]' is not a valid argument for 'instanceof' (evaluating 'node instanceof Node') - getDOMPath(): /usr/lib/node_modules/phantomas/core/scope.js @ 229 / appendSpy(): phantomjs://webpage.evaluate() @ 56 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 201 / unknown fn: http://www.rackspace.com/min/?g=js-header&1398982199 @ 16 / unknown fn: http://www.rackspace.com/min/?g=js-header&1398982199 @ 16 / unknown fn: http://www.rackspace.com/min/?g=js-header&1398982199 @ 16 / unknown fn: http://www.rackspace.com/min/?g=js-header&1398982199 @ 16
 * TypeError: '[object Object]' is not a valid argument for 'instanceof' (evaluating 'node instanceof Node') - getDOMPath(): /usr/lib/node_modules/phantomas/core/scope.js @ 229 / unknown fn: phantomjs://webpage.evaluate() @ 54 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 33 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 34 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 34 / unknown fn: /usr/lib/node_modules/phantomas/core/scope.js @ 34 / unknown fn: phantomjs://webpage.evaluate() @ 65 / unknown fn: phantomjs://webpage.evaluate() @ 90 / unknown fn: phantomjs://webpage.evaluate() @ 91 / unknown fn: phantomjs://webpage.evaluate() @ 91

Offenders for headersBiggerThanContent (8):
 * http://1055.ic-live.com/goat.php?cID=1055&cdid=4677&campID=8&ic_cat=&ic_type=&ic_bu=&ic_bc=&ic_ch=&ic_nso=&altid=US0a2563d9951d22310ee54c6facabb342&refVar= (body: 0.00 kB / headers: 0.89 kB)
 * http://1055.ic-live.com/goat.php?cID=1055&cdid=4677&campID=8&ic_cat=&ic_type=&ic_bu=&ic_bc=&ic_ch=&ic_nso=&altid=US0a2563d9951d22310ee54c6facabb342&refVar=&ic_cc=1&ic_old_pid=ac122470-3f01-46a6-a563-7370a3d44b2c&ic_old_sid=ac122470-3f01-46a6-a563-7370a3d41055 (body: 0.00 kB / headers: 0.19 kB)
 * http://cbi.boldchat.com/aid/181086145682362661/bc.cbhs?wdid=3585965807641389340&rdid=493576000255290256 (body: 0.11 kB / headers: 0.56 kB)
 * https://bs.serving-sys.com/BurstingPipe/ActivityServer.bs?cn=as&ActivityID=97068&rnd=676923.1935031712 (body: 0.00 kB / headers: 0.42 kB)
 * http://images.cdn.rackspace.com/footer/rug/callus-icon.png (body: 0.38 kB / headers: 0.40 kB)
 * http://images.cdn.rackspace.com/footer/rug/chatwithus-icon.png (body: 0.21 kB / headers: 0.37 kB)
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513 (body: 0.00 kB / headers: 0.74 kB)
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513&cvdone=p (body: 0.04 kB / headers: 0.61 kB)

Offenders for imageCount (26):
 * http://images.cdn.rackspace.com/home/v4/managed-hosting-icon.png (0.58 kB)
 * http://images.cdn.rackspace.com/home/v4/gdgt-logo.png (0.41 kB)
 * http://images.cdn.rackspace.com/home/v4/dominos-logo.png (0.82 kB)
 * http://images.cdn.rackspace.com/home/v4/private-cloud-icon.png (1.16 kB)
 * http://images.cdn.rackspace.com/home/v4/public-cloud-icon.png (1.22 kB)
 * http://images.cdn.rackspace.com/home/v4/simon-properties-logo.png (1.09 kB)
 * http://images.cdn.rackspace.com/home/v4/hubspot-logo.png (0.74 kB)
 * http://images.cdn.rackspace.com/home/v4/vevo-logo.png (0.53 kB)
 * http://images.cdn.rackspace.com/home/v4/snappaged-logo.png (1.06 kB)
 * http://images.cdn.rackspace.com/home/v4/hybrid-overview.png (8.75 kB)
 * http://images.cdn.rackspace.com/home/v4/support-overview.png (5.82 kB)
 * http://images.cdn.rackspace.com/home/v4/powered-by-openstack.png (8.17 kB)
 * http://images.cdn.rackspace.com/footer/rug/wevegotyourback-24x7x365.png (2.15 kB)
 * http://images.cdn.rackspace.com/footer/basement/rackerpowered-logo.png (2.47 kB)
 * http://images.cdn.rackspace.com/IS/chatslider/background_en.png (9.24 kB)
 * http://images.cdn.rackspace.com/IS/chatslider/smartbutton/available_en.gif (1.43 kB)
 * http://images.cdn.rackspace.com/IS/chatslider/close_en.png (0.92 kB)
 * http://images.cdn.rackspace.com/sprites/global_header-alt.png (15.36 kB)
 * http://images.cdn.rackspace.com/elements/arrow-pocketbutton_dropdown.png (0.93 kB)
 * http://images.cdn.rackspace.com/sprites/global_flags.png (5.74 kB)
 * http://images.cdn.rackspace.com/header/rackspace-logo-nav-173x51.png (5.31 kB)
 * http://images.cdn.rackspace.com/elements/button-arrow-white.png (2.76 kB)
 * http://images.cdn.rackspace.com/footer/rug/callus-icon.png (0.38 kB)
 * http://images.cdn.rackspace.com/footer/rug/chatwithus-icon.png (0.21 kB)
 * http://images.cdn.rackspace.com/footer/rug/emailus-icon.png (0.40 kB)
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513&cvdone=p (0.04 kB)

Offenders for smallImages (16):
 * http://images.cdn.rackspace.com/home/v4/managed-hosting-icon.png (0.58 kB)
 * http://images.cdn.rackspace.com/home/v4/gdgt-logo.png (0.41 kB)
 * http://images.cdn.rackspace.com/home/v4/dominos-logo.png (0.82 kB)
 * http://images.cdn.rackspace.com/home/v4/private-cloud-icon.png (1.16 kB)
 * http://images.cdn.rackspace.com/home/v4/public-cloud-icon.png (1.22 kB)
 * http://images.cdn.rackspace.com/home/v4/simon-properties-logo.png (1.09 kB)
 * http://images.cdn.rackspace.com/home/v4/hubspot-logo.png (0.74 kB)
 * http://images.cdn.rackspace.com/home/v4/vevo-logo.png (0.53 kB)
 * http://images.cdn.rackspace.com/home/v4/snappaged-logo.png (1.06 kB)
 * http://images.cdn.rackspace.com/IS/chatslider/smartbutton/available_en.gif (1.43 kB)
 * http://images.cdn.rackspace.com/IS/chatslider/close_en.png (0.92 kB)
 * http://images.cdn.rackspace.com/elements/arrow-pocketbutton_dropdown.png (0.93 kB)
 * http://images.cdn.rackspace.com/footer/rug/callus-icon.png (0.38 kB)
 * http://images.cdn.rackspace.com/footer/rug/chatwithus-icon.png (0.21 kB)
 * http://images.cdn.rackspace.com/footer/rug/emailus-icon.png (0.40 kB)
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513&cvdone=p (0.04 kB)

Offenders for timeToFirstImage (779):
 * http://images.cdn.rackspace.com/home/v4/managed-hosting-icon.png received in 779 ms

Offenders for httpsRequests (1):
 * https://bs.serving-sys.com/BurstingPipe/ActivityServer.bs?cn=as&ActivityID=97068&rnd=676923.1935031712

Offenders for redirects (1):
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513 is a redirect (HTTP 302 Moved Temporarily) to /cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513&cvdone=p (took 195 ms)

Offenders for cachingDisabled (1):
 * http://dc.rackspace.com/cm?ci=90378805%3B90378974&st=1399323913470&vn1=4.15.18&ec=utf-8&vn2=e4.0&pi=rackspace.com%3Ahybrid&ul=http%3A%2F%2Fwww.rackspace.com%2F&tid=6&cg=R113&rnd=1399333387351&pc=Y&jv=1.8.5&je=n&sw=1024&sh=768&pd=32&tz=4&pv_a1=US0a2563d9951d22310ee54c6facabb342&pv_a2=20140505160513&pv1=US0a2563d9951d22310ee54c6facabb342&pv2=20140505160513&cvdone=p

Offenders for domains (10):
 * images.cdn.rackspace.com: 25 request(s)
 * www.rackspace.com: 6 request(s)
 * 1055.ic-live.com: 2 request(s)
 * dc.rackspace.com: 2 request(s)
 * script: 1 request(s)
 * www.google.com: 1 request(s)
 * libs.coremetrics.com: 1 request(s)
 * 597fbcfa4a3865fb3530-f60a0bb748a3c84145bb10da7563bafb.r83.cf1.rackcdn.com: 1 request(s)
 * cbi.boldchat.com: 1 request(s)
 * bs.serving-sys.com: 1 request(s)

Offenders for DOMqueries (12):
 * tag name "head": 5 queries
 * tag name "script": 4 queries

Offenders for globalVariables (710):
 * A
 * setClassAsUnFocused
 * setClassAsNormal
 * c1
 * cmUA
 * cGO
 * cm_MC_USER_DETAILS_HOST
 * removeClass
 * cG8
 * user_defined1
 * _cm_NRSet
 * SPAN
 * UADetect
 * selection_changed
 * getSurvey
 * cm_JSFPMigrationOtherCookies
 * cmJSFGetSessionExpireCookieValue
 * CV
 * cmElementRecRequest
 * cm_JSFCoreCookieName
 * getUrlVars
 * cci
 * chat_racksid
 * cmJSFCreateUserId
 * cmJSFPMigrateLink
 * compare_usage
 * BLANK
 * cm_LinkClickDelayInterval
 * getDescendantsByAttributeValue
 * pixel
 * cmCreatePageviewTag
 * getHeight
 * validateRadio
 * loadChatInvite
 * findAncestorWithTagName
 * cmLoad
 * preEscape
 * cmAddShared
 * validateCheckbox
 * TR
 * validateManagedColocationForm
 * PANE_3_CLASS_NAME
 * getScreenX
 * cGC
 * Cpse
 * defaultNormalize
 * setY
 * cGI
 * validateXenApplicationForm
 * getElementsWithClassName
(660 more)

Offenders for globalVariablesFalsy (30):
 * cG8 = null
 * _cm_NRSet = false
 * cm_JSFPMigrationOtherCookies = null
 * cci = null
 * cm_JSFPForceMigrateCookies = false
 * cm_NewLinkTracker = false
 * cGU = false
 * cGS = false
 * cm_IOEnabled = false
 * cmNormalizeWhiteList = null
 * cm_JSFEnabled = false
 * cm_UseCookie = false
 * chost = null
 * cm_ATEnabled = false
 * cm_AvidLoadTimedOut = false
 * cm_JSFPMigrationDomainBlacklist = null
 * cm_DownloadExtensions = null
 * cm_LinkClickDelay = false
 * cm_OffsiteImpressionsEnabled = false
 * cm_MCEnabled = false
 * cm_JSFEAMasterIDSessionCookie = false
 * cGA = null
 * _$cV1 = null
 * cm_JSFPCookieMigrate = false
 * cmCheckCMEMFlag = false
 * http_request = false
 * cmSubmitFlag = false
 * cm_JSFPMigrationPathWhitelist = null
 * cm_JSFPMigrationDomainWhitelist = null
 * dontExit = false

Offenders for smallestResponse (0):
 * http://script/mbox.js (0.00 kB)

Offenders for biggestResponse (258218):
 * http://www.rackspace.com/min/?g=css&1398982199 (252.17 kB)

Offenders for fastestResponse (17):
 * http://1055.ic-live.com/goat.php?cID=1055&cdid=4677&campID=8&ic_cat=&ic_type=&ic_bu=&ic_bc=&ic_ch=&ic_nso=&altid=US0a2563d9951d22310ee54c6facabb342&refVar=&ic_cc=1&ic_old_pid=ac122470-3f01-46a6-a563-7370a3d44b2c&ic_old_sid=ac122470-3f01-46a6-a563-7370a3d41055 (17 ms)

Offenders for slowestResponse (439):
 * http://www.rackspace.com/ (439 ms)

Offenders for smallestLatency (0):
 * http://script/mbox.js (undefined ms)

Offenders for biggestLatency (0):
 * http://script/mbox.js (undefined ms)
@macbre macbre added the bug label May 10, 2014
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macbre commented May 10, 2014

Hm, there are actually more issues when loading rackspace site using phantomas:

'[object Object]' is not a valid argument for 'instanceof' (evaluating 'node instanceof Node')
10:47:25.001 Backtrace: getDOMPath(): /core/scope.js @ 229

I see non zero value of timeToFirstByte metric, however it seems to be calculate for a JS asset instead of HTML response:

10:47:24.285 Time to first byte: set to 89 ms for <http://libs.coremetrics.com/eluminate.js> (HTTP 200)

I'll take a look. Thanks for bug report.

@macbre macbre added this to the v1.2 milestone May 10, 2014
@macbre macbre self-assigned this May 10, 2014
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macbre commented May 10, 2014

JS assets included at the top of the page were fetched before the HTML response finished to load causing race conditions.

macbre added a commit that referenced this issue May 10, 2014
@macbre
timeToFirstByte: fix #298
a7e1780 
* move to a separate core module
@macbre macbre mentioned this issue May 10, 2014
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macbre commented May 10, 2014

Fixed by #299

@jimaek
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jimaek commented May 10, 2014

awesome thank you

@macbre macbre changed the title timeToFirstByte: 0 timeToFirstByte: fix race condition May 10, 2014
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