Instead of calling packages.Load on every character change, we reparse
the import declarations of the file and determine if they have
changed. We also introduce a metadata cache that caches the import
graph. This is used in type-checking and only updated on calls to
packages.Load.
Change-Id: I7cb384aba77ef3c1565d3b0db58e6c754d5fed15
Reviewed-on: https://go-review.googlesource.com/c/tools/+/165137
Reviewed-by: Ian Cottrell <iancottrell@google.com>
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>