Cache packageName to base Uri mapping.

Cache packageName to base Uri mapping.

This makes analysis with using incremental analysis cache 30% faster.
Without this change getBase() takes 40% (!) of total analysis time.
With this change - just 0.79% of total time.

Although the remaining 17% of PackagesBase.resolve() make my cry.
Why URI manipulations are SO SLOW?!

R=brianwilkerson@google.com, pquitslund@google.com, kevmoo@google.com
BUG=

Committed: 71ec48333eb8785969a20903903585a39f29c9d7

[pquitslund, 2016-06-07 20:41:47]

LGTM.

Wow.  Great catch!

[Brian Wilkerson, 2016-06-07 20:51:00]

lgtm

[kevmoo, 2016-06-07 22:49:12]

One nit – otherwise...uh...awesome!

https://codereview.chromium.org/2041103005/diff/20001/.gitignore
File .gitignore (right):

https://codereview.chromium.org/2041103005/diff/20001/.gitignore#newcode1
.gitignore:1: .idea
Let's not ignore IDE-specific files.

Put these in your global .gitignore

[scheglov, 2016-06-08 01:50:22]

Description was changed from

==========
Cache packageName to base Uri mapping.

This makes analysis with using incremental analysis cache 30% faster.
Without this change getBase() takes 40% (!) of total analysis time.
With this change - just 0.79% of total time.

Although the remaining 17% of PackagesBase.resolve() make my cry.
Why URI manipulations are SO SLOW?!

R=brianwilkerson@google.com, pquitslund@google.com, kevmoo@google.com
BUG=
==========

to

==========
Cache packageName to base Uri mapping.

This makes analysis with using incremental analysis cache 30% faster.
Without this change getBase() takes 40% (!) of total analysis time.
With this change - just 0.79% of total time.

Although the remaining 17% of PackagesBase.resolve() make my cry.
Why URI manipulations are SO SLOW?!

R=brianwilkerson@google.com, pquitslund@google.com, kevmoo@google.com
BUG=

Committed: 71ec48333eb8785969a20903903585a39f29c9d7
==========

[scheglov, 2016-06-08 01:50:23]

Committed patchset #2 (id:20001) manually as
71ec48333eb8785969a20903903585a39f29c9d7 (presubmit successful).