Improvements

• Further reduced allocations
  • The compact, console, TAP and XML reporters perform less allocations in various cases
  • Removed 1 allocation per entered SECTION/TEST_CASE.
  • Removed 2 allocations per test case exit, if stdout/stderr is captured
• Improved performance
  • Section tracking is 10%-25% faster than in v3.3.0
  • Assertion handling is 5%-10% faster than in v3.3.0
  • Test case registration is 1%-2% faster than in v3.3.0
  • Tiny speedup for registering listeners
  • Tiny speedup for CAPTURE, TEST_CASE_METHOD, METHOD_AS_TEST_CASE, and TEMPLATE_LIST_TEST_* macros.
• Contains, RangeEquals and UnorderedRangeEquals matchers now support ranges with iterator + sentinel pair
• Added IsNaN matcher
  • Unlike REQUIRE(isnan(x)), REQUIRE_THAT(x, IsNaN()) shows you the value of x.
• Suppressed declared_but_not_referenced warning for NVHPC (#2637)

Fixes

• Fixed performance regression in section tracking introduced in v3.3.1
  • Extreme cases would cause the tracking to run about 4x slower than in 3.3.0