By #18976, CLI now supports glob patterns.

However, as pointed out in the review, the expansion is currently single-threaded.

Furthermore, to handle cases like **/*.ts, it always searches everything from the cwd.

As potential improvements:

• Simply use build_parallel() execution
• Find a common prefix directory and narrow down the search from there

Find common usecases, benchmark and determine how useful either or both of these approaches would actually be.