An extension spamming console.log will take a lot of CPU time in the render process

<!-- ⚠️⚠️ Do Not Delete This! bug_report_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- 🕮 Read our guide about submitting issues: https://github.com/microsoft/vscode/wiki/Submitting-Bugs-and-Suggestions --> <!-- 🔎 Search existing issues to avoid creating duplicates. --> <!-- 🧪 Test using the latest Insiders build to see if your issue has already been fixed: https://code.visualstudio.com/insiders/ --> <!-- 💡 Instead of creating your report here, use 'Report Issue' from the 'Help' menu in VS Code to pre-fill useful information. --> - VS Code Version: 1.53.2 - OS Version: macOS Catalina 10.15.5 I'm working on a Java project https://github.com/eclipse/eclipse.jdt.ls, which includes about 6K+ Java files. It works well in 1.52. But after upgrading VS Code to 1.53, editing at the same workspace becomes pretty slow. Especially after i edit some Java files for a while, the whole VS Code starts to become pretty slow. And i saw the render process took much CPU resources. <img width="859" alt="Screen Shot 2021-02-23 at 15 03 45" src="https://user-images.githubusercontent.com/14052197/108812411-09137800-75ea-11eb-8198-f8a6d1b4c208.png"> Below is the CPU profile result by [profiling the render process](https://github.com/microsoft/vscode/wiki/Performance-Issues#profiling-the-renderer-process). [CPU-20210223T150659.cpuprofile.txt](https://github.com/microsoft/vscode/files/6027260/CPU-20210223T150659.cpuprofile.txt)