Proposed changes

Some performance improvements in the browser runner. We are using now the new messaging system to push the result to the worker rather than pulling it from a browser global through execute command.

Background: it seemed that with a lot of test the execute command always returned the same result e.g. failures = null which would cause the test to stale and timeout.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Further comments

Reviewers: @webdriverio/project-committers