feat(HTTPResponse): expose timing information

docs/api.md

@@ -375,6 +375,7 @@
   * [httpResponse.status()](#httpresponsestatus)
   * [httpResponse.statusText()](#httpresponsestatustext)
   * [httpResponse.text()](#httpresponsetext)
+  * [httpResponse.timing()](#httpresponsetiming)
   * [httpResponse.url()](#httpresponseurl)
 - [class: SecurityDetails](#class-securitydetails)
   * [securityDetails.issuer()](#securitydetailsissuer)
@@ -5231,6 +5232,30 @@ Contains the status text of the response (e.g. usually an "OK" for a success).
 
 - returns: <[Promise]<[string]>> Promise which resolves to a text representation of response body.
 
+#### httpResponse.timing()
+
+- returns: <?[Object]>
+  - `requestTime` <[number]> baseline in seconds
+  - `proxyStart` <[number]> started resolving proxy (milliseconds since requestTime)
+  - `proxyEnd` <[number]> finished resolving proxy (milliseconds since requestTime)
+  - `dnsStart` <[number]> started DNS address resolve (milliseconds since requestTime)
+  - `dnsEnd` <[number]> finished DNS address resolve (milliseconds since requestTime)
+  - `connectStart` <[number]> started connecting to the remote host (milliseconds since requestTime)
+  - `connectEnd` <[number]> connected to the remote host (milliseconds since requestTime)
+  - `sslStart` <[number]> started SSL handshake (milliseconds since requestTime)
+  - `sslEnd` <[number]> finished SSL handshake (milliseconds since requestTime)
+  - `workerStart` <[number]> started running ServiceWorker (milliseconds since requestTime)
+  - `workerReady` <[number]> finished Starting ServiceWorker (milliseconds since requestTime)
+  - `workerFetchStart` <[number]> started fetch event (milliseconds since requestTime)
+  - `workerRespondWithSettled` <[number]> settled fetch event respondWith promise (milliseconds since requestTime)
+  - `sendStart` <[number]> started sending request (milliseconds since requestTime)
+  - `sendEnd` <[number]> finished sending request (milliseconds since requestTime)
+  - `pushStart` <[number]> time the server started pushing request (milliseconds since requestTime)
+  - `pushEnd` <[number]> time the server finished pushing request (milliseconds since requestTime)
+  - `receiveHeadersEnd` <[number]> finished receiving response headers (milliseconds since requestTime)
+
+Timing information related to the response.
+
 #### httpResponse.url()
 
 - returns: <[string]>

src/common/HTTPResponse.ts

@@ -57,6 +57,7 @@ export class HTTPResponse {
   private _fromServiceWorker: boolean;
   private _headers: Record<string, string> = {};
   private _securityDetails: SecurityDetails | null;
+  private _timing: Protocol.Network.ResourceTiming | null;
 
   /**
    * @internal
@@ -93,6 +94,7 @@ export class HTTPResponse {
     this._securityDetails = responsePayload.securityDetails
       ? new SecurityDetails(responsePayload.securityDetails)
       : null;
+    this._timing = responsePayload.timing;
   }
 
   /**
@@ -172,6 +174,13 @@ export class HTTPResponse {
     return this._securityDetails;
   }
 
+  /**
+   * @returns Timing information related to the response.
+   */
+  timing(): Protocol.Network.ResourceTiming | null {
+    return this._timing;
+  }
+
   /**
    * @returns Promise which resolves to a buffer with response body.
    */

test/network.spec.ts

@@ -430,6 +430,17 @@ describe('network', function () {
     });
   });
 
+  describeFailsFirefox('Response.timing', function () {
+    it('returns timing information', async () => {
+      const { page, server } = getTestState();
+      const responses = [];
+      page.on('response', (response) => responses.push(response));
+      await page.goto(server.EMPTY_PAGE);
+      expect(responses.length).toBe(1);
+      expect(responses[0].timing().receiveHeadersEnd).toBeGreaterThan(0);
+    });
+  });
+
   describeFailsFirefox('Network Events', function () {
     it('Page.Events.Request', async () => {
       const { page, server } = getTestState();