Improvements

• Slightly improved compile times of benchmarks
• Made the resolution estimation in benchmarks slightly more precise
• Added new test case macro, TEST_CASE_PERSISTENT_FIXTURE (#2885, #1602)
  • Unlike TEST_CASE_METHOD, the same underlying instance is used for all partial runs of that test case
• MASSIVELY improved performance of the JUnit reporter when handling successful assertions (#2897)
  • For 1 test case and 10M assertions, the new reporter runs 3x faster and uses up only 8 MB of memory, while the old one needs 7 GB of memory.
• Reworked how output redirects works.
  • Combining a reporter writing to stdout with capturing reporter no longer leads to the capturing reporter seeing all of the other reporter's output.
  • The file based redirect no longer opens up a new temporary file for each partial test case run, so it will not run out of temporary files when running many tests in single process.

Miscellaneous

• Better documentation for matchers on thrown exceptions (REQUIRE_THROWS_MATCHES)
• Improved catch_discover_tests's handling of environment paths (#2878)
  • It won't reorder paths in DL_PATHS or DYLD_FRAMEWORK_PATHS args
  • It won't overwrite the environment paths for test discovery