Manager: our file IO is slow, any suggestions to make it faster?

Code: multithread writing to a few hundred small (temp) files then single thread combine to one big file and delete the temp files.

Eyes: bleeding

My favourite dev tool? I would't be able to do my work without any tool, which's in the list. I love IntelliJ IDEA & Webstorm, Java, JavaFX, Maven, Git & Gitlab, TeamCity, Upsource, YouTrack, Artifactory, wtf that list's kinda the complete tech stack. But I completly hate AWT & Swing (AWT fucks up on my Linux install, such a frame creates in about 10-20 seconds, if you test the app locally, you loose approximately 15 seconds per minute, and Swing uses AWT internally too), I hate Gradle (screw Google for standardizing it), and so on. Wow that's like my complete tech stack, what the fuck happend? The question was one tool, help me.

TL;DR: I should just stick to Python. I'm not touching front-end stuffs.

I got promoted to moderator of the subreddit of the game I play. Got greeted by a list of task involving tweaking the stylesheet (CSS). I said fine, I screwed around with CSS before I can screw with this again. So now I'm in charge of the whole op. Alone. Yay /s.

The objective is just dark-theme-ing the thing because white hurts (we all know that). So I fired up Firefox, made a test subreddit, cloned the whole stylesheet and sprites and started screwing around with my editor and Inspector Tool. And it hit me: One element refused to render (I don't if that's the correct technical term), and I don't even know why the fuck it didn't render. 15 minutes fuzzing through and it still gave a middle finger. Fine. Fuck you. Full revert, back to original. Then I changed the original sheet one change at a time, reloading after every changes. After changing everything, it suddenly work. What the fuck. Why the fuck. How the fuck. How the bloody fuck. How in the bloody fuck.

(""Fucks" per minute" sure is an effective measure of code quality)