title: What is the GWT byte-cache file?
body: <p>As a background, today, my GWT hosted mode runs just mysteriously slowed down to the extent that it is virtually not working. Whenever I pause the application the relevant threads (the main thread, the code server, etc.) are waiting on some file I/O native method. After scratching my head for a while I tried to clean up my hard disk a bit. Then I just discovered in my user's <code>Temp</code> folder a 4 gigabyte file named <code>gwt7155307955598297091byte-cache</code>. I wonder what this file may be good for, and what will happen if I delete it completely. Will I have a performance issue the next time I start the dev mode waiting for the "byte-cache" to be recreated?</p>