new features

• Add support for new architecture loongarch (#1173)
• Fixed version of random interleaving of benchmark repetitions (#1163, fixing #1051)
• Easier comparison of results across families (#1168 #1166 #1165 #1164)

fixes

• Fix perf counter argument parsing (#1160)

internal cleanup

• Drop warning to satisfy clang's -Wunused-but-set-variable diag (#1174)
• Enable some sanitizer builds in github actions (#1167 #1171)
• Fix memory leak in test (#1169)

new features

• better versioning in releases [#1047]
• MSVC arm64 support [#1090]
• add support for hardware performance counters [#1114, #1153]
• add interface for custom context to be included [#1127, #1137]
• random interleaving to reduce noise [#1105]

compiler cleanliness

• support -Wsuggest-override [#1059]
• builds correctly with gcc-11 [#1060]
• fix some windows warnings [#1121]
• fix -Wreserved-identifier failures [#1143]
• fix pendantic warnings [#1156]

New features

• Implement custom benchmark names (#1107)
• Support for macro expansion in benchmark names (#1054)
• Reduce ramp up repetitions when KeepRunningBatch is used (#1113)

Platform support

• CycleTimer implemented for M68K architecture (#1050)
• Support for DragonFly BSD (#1058)
• Better support for z/OS (#1063, #1067)
• Add MSVC ARM64 support for cycle clocks (#1052)
• Add support for Elbrus 2000 (#1091)
• Fix CPU frequency for AMD Ryzen (and probably other CPUs) (#1117)

Bug fixes

• Fix range when starting at zero (#1073)

Tool improvements

• Build tools with bazel (#982)
• Support JSON dumps of benchmark diffs (#1042)

• Timestamps in output are now rfc3339-formatted #965
• overflow warnings with timers fixed #980
• Python dependencies are now covered by a requirements.txt #994
• JSON output cleaned up when no CPU scaling is present (#1008)
• CartesianProduct added for easier settings of multiple ranges (#1029)
• Python bindings improvements:
  • Custom main functions (#993)
  • A rename to google_benchmark (#199
  • More state methods bound (#1037) with a builder interface (#1040)
• Workflow additions in github include pylint (#1039) and bindings runs (#1041)

• Python bindings are now available in //bindings/python
• Upgraded bazel from 0.10.1 to 3.2.0 (long overdue)
• RISC-V and PPC cycleclock fixes
• Various build warnings and cmake issues resolved
• Documentation improvements

• Bump CMake minimum version to 3.5.1 (see dependencies.md) (#801)
• Add threads and repetitions to the JSON outputa (#748)
• Memory management and reporting hooks (#625)
• Documentation improvements
• Miscellaneous build fixes (Mostly Intel compiler and Android)

Bug-fix release on v1.4.

• Realign expectation that State::iterations() returns 0 before the main benchmark loop begins. (#598)
• CMake error message fixes (#595, #584)
• Enscripten check fix (#583)
• OpenBSD porting (#582)
• Windows bazel fixes (#581)
• Bazel pthread linking (#579)
• Negative regexes (#576)
• gmock fix (#564)

• Removal of deprecated headers
• Improved CPU cache info reporting (#486)
• Support State::KeepRunningBatch() (#521)
• Support int64_t for AddRange()
• New platform support: NetBSD, s390x, Solaris
• Bazel build support
• Support googletest unit tests
• Add assembler tests
• Various warnings fixed

Highlights

• Ranged for loop optimization! (#454, #460)
• Make installation optional (#463)
• Better stats including user-provided ones (#428)
• JSON reporter format fixes (#426, #431)
• Documentation improvements (#445, #433, #466)

Highlights

• User-defined counters
• Single header library
• Ability to clear benchmarks so the runtime registration is more flexible
• Sample-based standard deviation
• 32-bit build enabled
• Bug fixes