Further improve isWithin() performance.

Further improve isWithin() performance.

On @scheglov's benchmark data, which include many path containing `.pub`
or `.pub-cache`, this results in a further ~8x improvement over the
improvements in e6b55472da7bfcfcc20db163abadfbd7689dd23c.

On the repo benchmark, this results in a further ~1.2x improvement.

Closes #7

R=rnystrom@google.com

Committed: https://github.com/dart-lang/path/commit/9c38bf477913a6d64bdf6047a9800788ffeec3b8

[nweiz, 2015-12-02 21:35:16]

Description was changed from

==========
Further improve isWithin() performance.

On @scheglov's benchmark data, which include many path containing `.pub`
or `.pub-cache`, this results in a further ~8x improvement over the
improvements in e6b55472da7bfcfcc20db163abadfbd7689dd23c.

On the repo benchmark, this results in a further ~1.2x improvement.
==========

to

==========
Further improve isWithin() performance.

On @scheglov's benchmark data, which include many path containing `.pub`
or `.pub-cache`, this results in a further ~8x improvement over the
improvements in e6b55472da7bfcfcc20db163abadfbd7689dd23c.

On the repo benchmark, this results in a further ~1.2x improvement.

Closes #7
==========

[nweiz, 2015-12-02 21:35:28]

nweiz@google.com changed reviewers:
+ rnystrom@google.com

[Bob Nystrom, 2015-12-02 22:07:28]

lgtm

[nweiz, 2015-12-02 22:08:36]

Description was changed from

==========
Further improve isWithin() performance.

On @scheglov's benchmark data, which include many path containing `.pub`
or `.pub-cache`, this results in a further ~8x improvement over the
improvements in e6b55472da7bfcfcc20db163abadfbd7689dd23c.

On the repo benchmark, this results in a further ~1.2x improvement.

Closes #7
==========

to

==========
Further improve isWithin() performance.

On @scheglov's benchmark data, which include many path containing `.pub`
or `.pub-cache`, this results in a further ~8x improvement over the
improvements in e6b55472da7bfcfcc20db163abadfbd7689dd23c.

On the repo benchmark, this results in a further ~1.2x improvement.

Closes #7

R=rnystrom@google.com

Committed:
https://github.com/dart-lang/path/commit/9c38bf477913a6d64bdf6047a9800788ffee...
==========

[nweiz, 2015-12-02 22:08:38]

Committed patchset #1 (id:1) manually as
9c38bf477913a6d64bdf6047a9800788ffeec3b8 (presubmit successful).