By day, I build the Fiddler Web Debugger. I’ve recently started integrating telemetry collection into the application for automated exception reporting and to collect information about the user’s environment to ensure that Fiddler testing environments match real-world usage. The data is fascinating (and I’ll probably blog more about it later), but one data point inContinue reading “Tuning MemoryStream”
Category Archives: perf
Zopfli All The Things
I’ve written about Zopfli quite a bit in the past, and even wrote a tool to apply it to PNG files. For fun, I had a look at one of the most optimized pages in the world: Google.com, through the lens of Zopfli. Here are the basic resources delivered by the Google homepage: This breakdownContinue reading “Zopfli All The Things”
Photoshop and Save For Web
Adobe recently announced that “Save for Web” in Photoshop is a “legacy feature” which won’t be improved. I decided to have a look at Adobe Photoshop CC (2015.0.0 Release 20150529.r88 x64) to see the impact of its many different “save” commands on the resulting file size. First, I created a trivial 20×20 image and drewContinue reading “Photoshop and Save For Web”
Content Blocking: Unintended Consequences
Our company uses a web firewall device called IronPort to attempt to block unwanted network traffic; it blocks access to known phish and malware domains, and, more annoyingly, domains thought to be related to gaming or “questionable” topics (e.g. politics). Whatever. Today the IT department pushed a new rule set which blocks some requests to domains likeContinue reading “Content Blocking: Unintended Consequences”
Optimize PNGs using PngDistill
Unfortunately, many PNG image generators opt for minimum compression time, failing to achieve maximum compression. Even worse, the most popular PNG generation tools often include huge amounts of unnecessary metadata that can bloat images by thousands of percent! Fiddler now includes PngDistill, a simple tool that removes unnecessary metadata chunks and recompresses PNG image dataContinue reading “Optimize PNGs using PngDistill”
text/plain 