Version 3.24.39 (based on bleeding_edge revision r19365)

Introduce --job-based-sweeping flag and use individual jobs for sweeping if set (issue 3104).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@19366 ce2b1a6d-e550-0410-aec6-3dcde31c8c00