Meziantou.FrameworkPerformanceResourceTiming Class
The timing of the fetch of a resource (https://w3c.github.io/resource-timing/#sec-performanceresourcetiming), added to the performance timeline of the global object that fetched it. The times are in milliseconds relative to the time origin of the global object, or 0 when they are not exposed (e.g. the timing allow check failed for a cross-origin resource).
public class PerformanceResourceTiming : PerformanceEntry- Inheritance
PerformanceEntryPerformanceResourceTiming
Properties
| Name | Description |
|---|---|
| ConnectEnd | Gets the time the connection was established, or 0. |
| ConnectStart | Gets the time the connection started, or 0. |
| ContentEncoding | Gets the content coding of the response (https://w3c.github.io/resource-timing/#dom-performanceresourcetiming-contentencoding): the value of its Content-Encoding header when it is a content coding supported by the browsers, multiple for several codings, @unknown for another value, or the empty string (no content coding, or a CORS-cross-origin response). |
| ContentType | Gets the minimized MIME type of the response (e.g. text/css), or the empty string. |
| DecodedBodySize | Gets the size of the body of the response, or 0 for a CORS-cross-origin response. |
| DeliveryType | Gets the delivery type of the resource: navigational-prefetch for the document of a navigation that used a navigational prefetch, cache for a resource whose stored response of the HTTP cache was used (validated or not, https://fetch.spec.whatwg.org/#fetch-finale), else the empty string. |
| DomainLookupEnd | Gets the time the domain name lookup completed, or 0. |
| DomainLookupStart | Gets the time the domain name lookup started, or 0. |
| EncodedBodySize | Gets the size of the body of the response, before its content codings are removed, or 0 for a CORS-cross-origin response. |
| FetchStart | Gets the time the fetch of the resource (after the redirects) started. |
| FinalResponseHeadersStart | Gets the time the headers of the final response were received, or 0. |
| FirstInterimResponseStart | Gets the time the first interim response (1xx) was received: 0, as the interim responses are not exposed by the loader. |
| InitiatorType | Gets the type of the initiator of the fetch (https://w3c.github.io/resource-timing/#dom-performanceresourcetiming-initiatortype): css for the resources of the style sheets (@import, fonts, images), the local name of the element that fetched the resource (e.g. img, script, link), fetch, xmlhttprequest, or other. |
| NextHopProtocol | Gets the ALPN protocol of the connection (e.g. http/1.1), or the empty string when it is not exposed. |
| RedirectEnd | Gets the time the last redirect completed, or 0. |
| RedirectStart | Gets the start time of the first redirect, or 0. |
| RenderBlockingStatus | Gets whether the resource blocked the rendering: blocking when the element that fetched it (a script, a style sheet link) was render-blocking when the fetch started, else non-blocking. |
| RequestStart | Gets the time the request was sent, or 0. |
| ResponseEnd | Gets the time the response was received. |
| ResponseStart | Gets the time the response started: PerformanceResourceTiming.FirstInterimResponseStart if it is not 0, otherwise PerformanceResourceTiming.FinalResponseHeadersStart. |
| ResponseStatus | Gets the status of the response, or 0 for a network error or an opaque response. |
| SecureConnectionStart | Gets the time the TLS handshake started, or 0 for a connection that is not secure. |
| ServerTiming | Gets the metrics of the Server-Timing headers of the response (https://w3c.github.io/server-timing/#dom-performanceresourcetiming-servertiming): empty when the global object is not a secure context or when the timing allow check failed. |
| TransferSize | Gets the size of the response: the encoded size of its body plus 300 (in place of the size of the headers), 300 for a stored response of the HTTP cache that was validated, or 0 for a stored response used without validation or when the timing allow check failed. |
| WorkerCacheLookupStart | Gets the time the service worker started to look up its caches for a router rule whose source is the cache, or 0. |
| WorkerFinalRouterSource | Gets the source that gave the response of a request that matched a router rule (e.g. network after a cache miss), or the empty string when no rule matched. |
| WorkerMatchedRouterSource | Gets the source of the router rule of the service worker that matched the request (e.g. network, cache), or the empty string when no rule matched. |
| WorkerRouterEvaluationStart | Gets the time the service worker started to evaluate its router rules, or 0 when the service worker has no router rule (or there is no service worker). |
| WorkerStart | Gets the time the fetch event of the request was dispatched to a service worker, or 0 when no service worker handled the request. |
ConnectEnd
PerformanceResourceTiming.csGets the time the connection was established, or 0.
public double ConnectEnd { get; }Property value
See also
ConnectStart
PerformanceResourceTiming.csGets the time the connection started, or 0.
public double ConnectStart { get; }Property value
See also
ContentEncoding
PerformanceResourceTiming.csGets the content coding of the response (https://w3c.github.io/resource-timing/#dom-performanceresourcetiming-contentencoding): the value of its Content-Encoding header when it is a content coding supported by the browsers, multiple for several codings, @unknown for another value, or the empty string (no content coding, or a CORS-cross-origin response).
public string ContentEncoding { get; }ContentType
PerformanceResourceTiming.csGets the minimized MIME type of the response (e.g. text/css), or the empty string.
public string ContentType { get; }Property value
See also
DecodedBodySize
PerformanceResourceTiming.csGets the size of the body of the response, or 0 for a CORS-cross-origin response.
public ulong DecodedBodySize { get; }DeliveryType
PerformanceResourceTiming.csGets the delivery type of the resource: navigational-prefetch for the document of a navigation that used a navigational prefetch, cache for a resource whose stored response of the HTTP cache was used (validated or not, https://fetch.spec.whatwg.org/#fetch-finale), else the empty string.
public string DeliveryType { get; }Property value
See also
DomainLookupEnd
PerformanceResourceTiming.csGets the time the domain name lookup completed, or 0.
public double DomainLookupEnd { get; }DomainLookupStart
PerformanceResourceTiming.csGets the time the domain name lookup started, or 0.
public double DomainLookupStart { get; }EncodedBodySize
PerformanceResourceTiming.csGets the size of the body of the response, before its content codings are removed, or 0 for a CORS-cross-origin response.
public ulong EncodedBodySize { get; }FetchStart
PerformanceResourceTiming.csGets the time the fetch of the resource (after the redirects) started.
public double FetchStart { get; }Property value
See also
FinalResponseHeadersStart
PerformanceResourceTiming.csGets the time the headers of the final response were received, or 0.
public double FinalResponseHeadersStart { get; }FirstInterimResponseStart
PerformanceResourceTiming.csGets the time the first interim response (1xx) was received: 0, as the interim responses are not exposed by the loader.
public double FirstInterimResponseStart { get; }InitiatorType
PerformanceResourceTiming.csGets the type of the initiator of the fetch (https://w3c.github.io/resource-timing/#dom-performanceresourcetiming-initiatortype): css for the resources of the style sheets (@import, fonts, images), the local name of the element that fetched the resource (e.g. img, script, link), fetch, xmlhttprequest, or other.
public string InitiatorType { get; }Property value
See also
NextHopProtocol
PerformanceResourceTiming.csGets the ALPN protocol of the connection (e.g. http/1.1), or the empty string when it is not exposed.
public string NextHopProtocol { get; }RedirectEnd
PerformanceResourceTiming.csGets the time the last redirect completed, or 0.
public double RedirectEnd { get; }Property value
See also
RedirectStart
PerformanceResourceTiming.csGets the start time of the first redirect, or 0.
public double RedirectStart { get; }Property value
See also
RenderBlockingStatus
PerformanceResourceTiming.csGets whether the resource blocked the rendering: blocking when the element that fetched it (a script, a style sheet link) was render-blocking when the fetch started, else non-blocking.
public string RenderBlockingStatus { get; }RequestStart
PerformanceResourceTiming.csResponseEnd
PerformanceResourceTiming.csResponseStart
PerformanceResourceTiming.csGets the time the response started: PerformanceResourceTiming.FirstInterimResponseStart if it is not 0, otherwise PerformanceResourceTiming.FinalResponseHeadersStart.
public double ResponseStart { get; }Property value
See also
ResponseStatus
PerformanceResourceTiming.csGets the status of the response, or 0 for a network error or an opaque response.
public ushort ResponseStatus { get; }SecureConnectionStart
PerformanceResourceTiming.csGets the time the TLS handshake started, or 0 for a connection that is not secure.
public double SecureConnectionStart { get; }ServerTiming
PerformanceResourceTiming.csGets the metrics of the Server-Timing headers of the response (https://w3c.github.io/server-timing/#dom-performanceresourcetiming-servertiming): empty when the global object is not a secure context or when the timing allow check failed.
public IReadOnlyList<PerformanceServerTiming> ServerTiming { get; }TransferSize
PerformanceResourceTiming.csGets the size of the response: the encoded size of its body plus 300 (in place of the size of the headers), 300 for a stored response of the HTTP cache that was validated, or 0 for a stored response used without validation or when the timing allow check failed.
public ulong TransferSize { get; }Property value
See also
WorkerCacheLookupStart
PerformanceResourceTiming.csGets the time the service worker started to look up its caches for a router rule whose source is the cache, or 0.
public double WorkerCacheLookupStart { get; }WorkerFinalRouterSource
PerformanceResourceTiming.csGets the source that gave the response of a request that matched a router rule (e.g. network after a cache miss), or the empty string when no rule matched.
public string WorkerFinalRouterSource { get; }WorkerMatchedRouterSource
PerformanceResourceTiming.csGets the source of the router rule of the service worker that matched the request (e.g. network, cache), or the empty string when no rule matched.
public string WorkerMatchedRouterSource { get; }WorkerRouterEvaluationStart
PerformanceResourceTiming.csGets the time the service worker started to evaluate its router rules, or 0 when the service worker has no router rule (or there is no service worker).
public double WorkerRouterEvaluationStart { get; }WorkerStart
PerformanceResourceTiming.csGets the time the fetch event of the request was dispatched to a service worker, or 0 when no service worker handled the request.
public double WorkerStart { get; }