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PerformanceResourceTiming.requestStart - Web APIs

Web › API › PerformanceResourceTiming › requestStart

the requeststart read-only property returns a timestamp of the time immediately before the browser starts requesting the resource from the server, cache, or local resource.
... there is no end property for requeststart.
... syntax resource.requeststart; return value a domhighrestimestamp representing the time immediately before the browser starts requesting the resource from the server example in the following example, the value of the *start and *end properties of all "resource" type events are logged.
...And 2 more matches

PerformanceTiming.requestStart - Web APIs

Web › API › PerformanceTiming › requestStart

the legacy performancetiming.requeststart read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, when the browser sent the request to obtain the actual document, from the server or from a cache.
... syntax time = performancetiming.requeststart; specifications specification status comment navigation timingthe definition of 'performancetiming.requeststart' in that specification.

Navigation and resource timings - Web Performance

Web › Performance › Navigation and resource timings

as displayed in the image below, the navigation process goes from navigationstart, unloadeventstart, unloadeventend, redirectstart, redirectend, fetchstart, domainlookupstart, domainlookupend, connectstart , connectend, secureconnectionstart, requeststart, responsestart, responseend, domloading, dominteractive, domcontentloadedeventstart, domcontentloadedeventend, domcomplete, loadeventstart, and loadeventend.
... requeststart when the browser sent the request to obtain the actual document, from the server or from a cache.
...in other words, if a secure connection was used, secureconnectionstart will be truthy, and the time between secureconnectionstart and requeststart will greater than 0.
...And 2 more matches

Using the Resource Timing API - Web APIs

Web › API › Resource Timing API › Using the Resource Timing API

this example also calculates the time from the start of the fetch and request start phases (fetchstart and requeststart, respectively), until the response has ended (responseend).
...fetch until response end time = " + t); // request start until reponse end t = (resources[i].requeststart > 0) ?
... (resources[i].responseend - resources[i].requeststart) : "0"; console.log("...
... the properties which are returned as 0 by default when loading a resource from a domain other than the one of the web page itself: redirectstart, redirectend, domainlookupstart, domainlookupend, connectstart, connectend, secureconnectionstart, requeststart, and responsestart.

Index - Web APIs

Web › API › Index

3041 performanceresourcetiming.requeststart api, property, reference, web performance the requeststart read-only property returns a timestamp of the time immediately before the browser starts requesting the resource from the server, cache, or local resource.
... 3070 performancetiming.requeststart api, backwards compatibility, deprecated, navigation timing, performancetiming, property, read-only, legacy the legacy performancetiming.requeststart read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, when the browser sent the request to obtain the actual document, from the server or from a cache.

Resource Timing API - Web APIs

Web › API › Resource Timing API

the last three timestamps are, in order: requeststart - the timestamp before the browser starts requesting the resource from the server; responsestart - the timestamp after the browser receives the first byte of the response from the server; and responseend - the timestamp after the browser receives the last byte of the resource.
... the properties which are returned as 0 by default when loading a resource from a domain other than the one of the web page itself: redirectstart, redirectend, domainlookupstart, domainlookupend, connectstart, connectend, secureconnectionstart, requeststart, and responsestart.

Time to first byte - MDN Web Docs Glossary: Definitions of Web-related terms

Glossary › time to first byte

ttfb is the time it takes between the start of the request and the start of the response, in milliseconds: ttfb = responsestart - requeststart see also: a typical http session performanceresourcetiming performancetiming ...

Navigation Timing API - Web APIs

Web › API › Navigation timing API

calculate request response time you can calculate the time elapsed between the beginning of a request and the completion of getting the response using code like this: const connecttime = perfdata.responseend - perfdata.requeststart; here, the time at which the request was initiated (requeststart).

PerformanceNavigationTiming - Web APIs

Web › API › PerformanceNavigationTiming

performancenavigationtiming.requeststart read only a domhighrestimestamp representing the time immediately before the user agent starts requesting the resource from the server, or from relevant application caches or from local resources.

PerformanceResourceTiming.connectEnd - Web APIs

Web › API › PerformanceResourceTiming › connectEnd

ource"); for (var i=0; i < p.length; i++) { print_start_and_end_properties(p[i]); } } function print_start_and_end_properties(perfentry) { // print timestamps of the *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("...

PerformanceResourceTiming.connectStart - Web APIs

Web › API › PerformanceResourceTiming › connectStart

ar i=0; i < p.length; i++) { print_start_and_end_properties(p[i]); } } function print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("...

PerformanceResourceTiming.domainLookupEnd - Web APIs

Web › API › PerformanceResourceTiming › domainLookupEnd

ource"); for (var i=0; i < p.length; i++) { print_start_and_end_properties(p[i]); } } function print_start_and_end_properties(perfentry) { // print timestamps of the *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("...

PerformanceResourceTiming.domainLookupStart - Web APIs

Web › API › PerformanceResourceTiming › domainLookupStart

ar i=0; i < p.length; i++) { print_start_and_end_properties(p[i]); } } function print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("...

PerformanceResourceTiming.fetchStart - Web APIs

Web › API › PerformanceResourceTiming › fetchStart

ar i=0; i < p.length; i++) { print_start_and_end_properties(p[i]); } } function print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("...

PerformanceResourceTiming.redirectEnd - Web APIs

Web › API › PerformanceResourceTiming › redirectEnd

ar i=0; i < p.length; i++) { print_start_and_end_properties(p[i]); } } function print_start_and_end_properties(perfentry) { // print timestamps of the performanceentry *start and *end properties properties = ["connectstart", "connectend", "domainlookupstart", "domainlookupend", "fetchstart", "redirectstart", "redirectend", "requeststart", "responsestart", "responseend", "secureconnectionstart"]; for (var i=0; i < properties.length; i++) { // check each property var supported = properties[i] in perfentry; if (supported) { var value = perfentry[properties[i]]; console.log("...