Note: This blog post was originally written before the new Chromium-based Microsoft Edge was announced. As a consequence, it includes discussion of the behavior of the Legacy Microsoft Edge browser. The new Chromium-based Edge behaves largely the same way as Google Chrome. Last Update: 13 June 2025 InPrivate Mode was introduced in Internet Explorer 8Continue reading “Private Browsing Mode”
Tag Archives: performance
Finding Image Bloat In Binary Files
I’ve previously talked about using PNGDistill to optimize batches of images, but in today’s quick post, I’d like to show how you can use the tool to check whether images in your software binaries are well optimized. For instance, consider Chrome. Chrome uses a lot of PNGs, all mashed together a single resources.pak file. Tip:Continue reading “Finding Image Bloat In Binary Files”
2016 Brotli Update
Windows 10 Build 14986 adds support for Brotli compression to the Edge browser (but, somewhat surprisingly, not IE11). So at the end of 2016, we now have support for this improved compression algorithm in Chrome, Firefox, Edge, Opera, Brave, Vivaldi, and the long tail of browsers based on Chromium. Of modern browsers, only Apple isContinue reading “2016 Brotli Update”
Out-of-Memory is (Usually) a Lie
The most common exception logged by Fiddler telemetry is OutOfMemoryException. Yesterday, a Facebook friend lamented: “How does firefox have out of memory errors so often while only taking up 1.2 of my 8 gigs of ram?” This morning, a Python script running on my machine as a part of the Chromium build process failed with aContinue reading “Out-of-Memory is (Usually) a Lie”
Automatically Evaluating Compressibility
Fiddler’s Transformer tab has long been a simple way to examine the use of HTTP compression of web assets, especially as new compression engines (like Zopfli) and compression formats (like Brotli) arose. However, the one-Session-at-a-time design of the Transformer tab means it is cumbersome to use to evaluate the compressibility of an entire page orContinue reading “Automatically Evaluating Compressibility”
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