You can increase the speed at which you work with VSCode by limiting the folders that VSCode shows & searches.
To exclude folders from showing up add the file globs you like(as shown in the example below)
Settings > Text Editor > Files > Files:Exclude
Settings > Text Editor > Features > Search > Search:Exclude
Add as many path/file patterns as you want like for e.g.,
**/node_modules **/tmp **.log **/target