Page speed
This topic describes the features available on the Page Speed page of ARMS browser monitoring.
After you connect your application to ARMS browser monitoring, you can view its performance data on the Page Speed page:
You can manually report custom performance metrics, such as first paint time and time to interact. For more information, see SDK methods.
Procedure
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Log on to the ARMS console. In the left-side navigation pane, choose .
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On the Browser Monitoring page, select a region in the top navigation bar and click the name of the application that you want to manage.
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In the left-side navigation pane, choose .
In the Page Speed Ranking section on the left side of the Page Speed page, you can sort pages by first paint time or page views. Click the up or down arrow to change the sort order.
Page load time details
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The line chart displays the average value of each metric within the specified time range. Averages reflect the mean performance over a period but can be skewed by outliers. For example, a single user session with a very slow page load due to a poor network connection can significantly inflate the average. To prevent outliers from skewing the overall performance trend, click the
icon in the upper-right corner to filter them out. -
If you notice a sudden spike in the data, use the performance distribution and slow page session trace modules to locate the problem.
Page load waterfall chart
The page load waterfall chart visualizes the time spent in each stage of the page loading process. To optimize performance, apply targeted solutions to specific stages.
Performance distribution
This module shows your page's performance distribution.
On the Performance Layer tab, the stacked area chart shows the performance distribution over time.
On the Performance Sample Distribution tab, you can view the distribution of page load times. For example, you can see the percentage of pages that load in under one second or identify the proportion of long-tail user samples.
The Performance Trend tab shows trend charts for the mean, 95th, 90th, 80th, and 60th percentiles of performance metrics such as DNS lookup time, TCP connection time, and page load time.
Slow page session trace
The slow page session trace feature provides a performance waterfall chart for static resource loading during the page loading process. This helps you understand resource loading details and quickly identify performance bottlenecks based on page performance data. For more information, see session tracing.
The list of slow page session traces includes the following fields: Page, Session ID, Browser, Page Load Time, and Start Time.
Page load distribution
Page loading occurs in the user's browser and is affected by factors such as geographic location, network conditions, browser type, and carrier. ARMS browser monitoring provides statistics on geographic, device, network, and version distributions to help you identify performance bottlenecks.
Performance metrics
Metric | Description | Formula | Notes |
FMP (First Meaningful Paint) | First meaningful paint | N/A | |
first paint time (FPT) | First paint time (white screen time) |
| The time from the start of the request until the browser first renders any content to the screen. |
time to interact (TTI) | Time to interact |
| The time from the start of the request until the page is fully interactive and responsive to user input. |
Ready | HTML load completion time, also known as DOM Ready time. |
| If the page contains synchronously executed JavaScript, the synchronous JS execution time = Ready - TTI. |
Load | Page load time |
| Measures the time until the entire page, including all dependent resources like stylesheets and images, has fully loaded. |
FirstByte | FirstByte time |
| The time from the start of the DNS lookup until the first byte of the response is received. |
Metric | Description | Formula | Notes |
DNS | DNS lookup time |
| N/A |
TCP | TCP connection time |
| N/A |
time to first byte (TTFB) | Time to first byte |
| TTFB can be calculated in multiple ways. The standard used by ARMS is based on the Google Developers definition. |
Trans | Content transfer time |
| N/A |
DOM | DOM parsing time |
| N/A |
Res | Resource loading time |
| The time taken to load all dependent resources after the initial HTML document has been parsed. |
SSL | SSL connection time |
| This metric is valid only for HTTPS connections. |