Increase tracing limit

Increase tracing limit

Increasing from 16 to 32 has a lot of nice small improvements and does
not seem to affect compile time (within benchmark noise).

BUG=
R=sigmund@google.com

Committed: https://github.com/dart-lang/sdk/commit/2955ecc79480135592f5f96a6c94422bca21ef70

[sra1, 2017-04-18 17:49:38]

sra@google.com changed reviewers:
+ sigmund@google.com

[Siggi Cherem (dart-lang), 2017-04-18 20:29:50]

lgtm

[Siggi Cherem (dart-lang), 2017-04-18 20:30:14]

https://codereview.chromium.org/2826623002/diff/1/pkg/compiler/lib/src/inferr...
File pkg/compiler/lib/src/inferrer/node_tracer.dart (right):

https://codereview.chromium.org/2826623002/diff/1/pkg/compiler/lib/src/inferr...
pkg/compiler/lib/src/inferrer/node_tracer.dart:81: const
int.fromEnvironment('dart2js.tracing.limit') ?? 32;
maybe instead do:
const int.fromEnvironment('...', defaultValue: 32);

[sra1, 2017-04-18 22:00:35]

Description was changed from

==========
Increase tracing limit

Increasing from 16 to 32 has a lot of nice small improvements and does
not seem to affect compile time (within benchmark noise).

BUG=
==========

to

==========
Increase tracing limit

Increasing from 16 to 32 has a lot of nice small improvements and does
not seem to affect compile time (within benchmark noise).

BUG=
R=sigmund@google.com

Committed:
https://github.com/dart-lang/sdk/commit/2955ecc79480135592f5f96a6c94422bca21ef70
==========

[sra1, 2017-04-18 22:00:36]

Committed patchset #2 (id:20001) manually as
2955ecc79480135592f5f96a6c94422bca21ef70 (presubmit successful).