Type Relation Test and Benchmarks

This directory contains tests and benchmarks of type relations, for example, isSubtypeOf.

Create or Update Benchmark Data

To collect new data for a benchmark, follow these steps:

1. Identify the program that the benchmark is based on, for example, pkg/compiler/bin/dart2js.dart.

2. Modify pkg/kernel/lib/type_environment.dart as described in the method SubtypeTester._collect_isSubtypeOf.

3. Compile the program using Fasta, for example:

   ./sdk/bin/dart pkg/front_end/tool/_fasta/compile.dart pkg/compiler/bin/dart2js.dart

4. This produces a file named type_checks.json in the current directory.

5. Compress the file using gzip.