What is a HAR file?Ī HAR (short for HTTP Archive) file is a JSON file containing all information about a browser’s interactions with a page. So how do we keep track of what is being analyzed by the Network tab? By exporting the page in HAR format.
Performance improvements are noticeable by changes in your code/environment. Last, but not least, the waterfall column demonstrates when the asset is loaded along with the other requests. The size value will present the gzipped size of the resource (when applicable), while the time column shows the total duration from the start of the request to the receipt of the final byte in the response. The size, time and waterfall columns will be crucial to understanding the performance of a page. You can add more information to this table by right-clicking one of the table headers and choosing other columns.
It will also show you relevant information about the origin of those assets (domain, HTTP status code, size), who initiated the request, and the order in which they were loaded in a waterfall representation. The network tab will give you a table containing all assets loaded on the page. I think about looking at the requests of a page, understanding what resources are being loaded, and how long these resources take to be available to users.
To generate a HAR file using Microsoft Edge, do the following:
#HAR VIEWER DEVELOPER TOOLS ARCHIVE#
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