PerformanceResourceTiming.secureConnectionStart - Web APIs
the secureconnectionstart read-only property returns a timestamp immediately before the browser starts the handshake process to secure the current connection.
... syntax resource.secureconnectionstart; return value if the resource is fetched over a secure connection, a domhighrestimestamp immediately before the browser starts the handshake process to secure the current connection.
...n 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("...
..." + properties[i] + " = not supported"); } } } specifications specification status comment resource timing level 1the definition of 'secureconnectionstart' in that specification.

PerformanceTiming.secureConnectionStart - Web APIs
the legacy performancetiming.secureconnectionstart read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, where the secure connection handshake starts.
... syntax time = performancetiming.secureconnectionstart; specifications specification status comment navigation timingthe definition of 'performancetiming.secureconnectionstart' in that specification.

Link types: preconnect - HTML: Hypertext Markup Language
the preconnect keyword for the rel attribute of the <link> element is a hint to browsers that the user is likely to need resources from the target resource's origin, and therefore the browser can likely improve the user experience by preemptively initiating a connection to that origin.
... specifications specification status comment html living standardthe definition of 'preconnect' in that specification.

Using dns-prefetch - Web Performance
second, it’s also possible to specify dns-prefetch (and other resources hints) as an http header by using the http link field: link: <https://fonts.gstatic.com/>; rel=dns-prefetch third, consider pairing dns-prefetch with the preconnect hint.
... while dns-prefetch only performs a dns lookup, preconnect establishes a connection to a server.
...you can safely use them together like so: <link rel="preconnect" href="https://fonts.gstatic.com/" crossorigin> <link rel="dns-prefetch" href="https://fonts.gstatic.com/"> note: if a page needs to make connections to many third-party domains, preconnecting them all is counterproductive.
...And 4 more matches

Navigation and resource timings - Web Performance
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.
... secureconnectionstart when the secure connection handshake starts.
... calculating timings we can use these values to measure specific timings of interest: let dns = time.domainlookupend - time.domainlookupstart, tcp = time.connectend - time.connectstart, ssl != time.secureconnectionstart, time to first byte time to first byte is the time between the navigationstart (start of the navigation) and responsestart, (when the first byte of response data is received) available in the performancetiming api: let ttfb = time.responsestart - time.navigationstart; page load time page load time is the time between navigationstart and the start of when the load event is sent for t...
...And 3 more matches

Index - Web APIs
3044 performanceresourcetiming.secureconnectionstart api, property, reference, web performance the secureconnectionstart read-only property returns a timestamp immediately before the browser starts the handshake process to secure the current connection.
... 3073 performancetiming.secureconnectionstart api, backwards compatibility, deprecated, navigation timing, performancetiming, property, read-only, legacy the legacy performancetiming.secureconnectionstart read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, where the secure connection handshake starts.
... api, ice, media, negotiation, property, rtcpeerconnection, read-only, reference, signaling, webrtc, webrtc api, signalingstate, state the read-only signalingstate property on the rtcpeerconnection interface returns one of the string values specified by the rtcsignalingstate enum; these values describe the state of the signaling process on the local end of the connection while connecting or reconnecting to another peer.

Using the Resource Timing API - Web APIs
tcp time = " + t); // secure connection time t = (resources[i].secureconnectionstart > 0) ?
... (resources[i].connectend - resources[i].secureconnectionstart) : "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.

Link types - HTML: Hypertext Markup Language
<link> <a>, <area>, <form> preconnect provides a hint to the browser suggesting that it open a connection to the linked web site in advance, without disclosing any private information or downloading any content, so that when the link is followed the linked content can be fetched more quickly.
... resource hintsthe definition of 'preconnect' in that specification.
... working draft added dns-prefetch, preconnect, and prerender values.

Resource Timing API - Web APIs
if the resource is loaded via a secure connection a secureconnectionstart timestamp will be available between the connection start and end events.
... 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.

Using server-sent events - Web APIs
retry the reconnection time to use when attempting to send the event.
... this must be an integer, specifying the reconnection time in milliseconds.

HTML attribute: rel - HTML: Hypertext Markup Language
external resource not allowed not allowed preconnect specifies that the user agent should preemptively connect to the target resource's origin.
... preconnect specifies that the user agent should preemptively connect to the target resource's origin.

Web performance resources - Learn web development
using resource hints such as rel=preconnect, rel=dns-prefetch, rel=prefetch, and rel=preload keep the size of javascript to a minimum.

sslfnc.html
description ssl peers frequently reconnect after a relatively short time has passed.

sslintro.html
initializing caches ssl peers frequently reconnect after a relatively short time has passed.

Gamepad.index - Web APIs
this can be used to distinguish multiple controllers; a gamepad that is disconnected and reconnected will retain the same index.