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Number on Diagram | Metric Name | Description |
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1 | Step Nr | The Step (sometimes Page) number |
2 | URL number | The identifier of a URL inside of a Step. This is a counter that is unique per Step and corresponds to a URL inside of the Step |
3 | URL | The complete URL including protocol, hostname, path and query parameters |
4 | HTTP method | The HTTP method used (e.g. GET, POST, PUT) |
5 | HTTP status code | The returned status code from the server (200, 302, 500, etc.) |
6 | URL Offset ms | The time offset in milliseconds from when the URL was initiated by the browser relative to the first URL on the Step |
7 | Blocked duration ms | The time the URL is blocked (aka Queued By Browser) inside of the browser before it is executed |
8 | DNS lookup duration ms | The time it took to perform a DNS lookup/query and receive the result back |
9 | Connect duration ms | The time it took to establish a connection to the target system |
10 | Send duration ms | The time it took to send the request from the browser |
11 | Wait duration ms | The time it took for the target system to return the first response (that is, the Response Headers) |
12 | Receive duration ms | The time it took for the complete response to be returned from the target system, including headers and content |
13 | Response time ms | The total network response time for this URL ( |
14 | Received bytes | The number of uncompressed bytes received from the server |
15 | Content mime type | MIME type of the response content |
16 | Blocked url offset ms | A timestamp indicating the offset of the Blocked timing relative from when the URL was started |
17 | DNS lookup URL offset ms | A timestamp indicating the offset of the DNS Lookup timing relative from when the URL was started |
18 | Connect URL offset ms | A timestamp indicating the offset of the Connect timing relative from when the URL was started |
19 | Send URL offset ms | A timestamp indicating the offset of the Send timing relative from when the URL was started |
20 | Wait offset ms | A timestamp indicating the offset of the Wait timing relative from when the URL was started |
21 | Receive URL offset ms | A timestamp indicating the offset of the Receive timing relative from when the URL was started |
22 | Step duration ms | The total amount of time it took all URLs on the page to finish loading. In the following example, the “Step duration” of the page is 6,030ms:  As you can see here, the final URL in the waterfall for this page finished loading between 6 and 7 seconds, roughly matching the 6,030ms reported as the “Step duration”:  For further confirmation, if you hover over the final URL and add the metrics together, you will find the sum of the metrics equals the Step duration: 
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When the check records Websockets, you can get a detailed view of the recorded data by expanding the relevant result Waterfall row. |
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The WebSockets frame shows all recorded events for the selected URL. When WebSocket recording data is available, this is indicated by a button in the waterfall row:
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View WebSocket recording
For each row in the waterfall table, further details are available.
To expand the row for a page:
Click the expand button
The WebSocket recording is shown next to the result history:
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Legend
The Legend section at the bottom of a Browser Check Result page displays the color coding which is used to identify different URL operations for each URL in the result. Hover over the “question mark” icons to learn more about how ASM defines DOM Interactive, DOM Content Loaded, and DOM Complete:
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