My beef with GitHub's code search is that it doesn't distinguish between the definition of a symbol and the uses of the symbol, so you need to wade through 5 pages of results to get the one result you're looking for. I would contrast that to my IDE which usually scores a direct hit if I enter a search in the right box.
The indexing they talk about in that article seems like rearranging the deck chairs on the Titanic so far as that is concerned.
The indexing they talk about in that article seems like rearranging the deck chairs on the Titanic so far as that is concerned.