What's Changed

Bug Fixes

• Test completion hang under rate limiting: Fixed an issue where rate limiting could cause tests to hang at completion (#340).
• Reconnect interval hang fix: Resolved a hang when using --reconnect-interval together with --rate-limiting (#348).

Build & Configuration Improvements

• Respect user-supplied CXXFLAGS: The configure script now properly honors user-provided CXXFLAGS, improving flexibility for custom builds and packaging workflows (#342).
• Organization rename update: Updated references from redislabs to redis (#339).

Developer Tooling & CI Improvements

• Code style enforcement: Added clang-format configuration to standardize code formatting and improve consistency across contributions (#336).
• Faster CI pipelines: (#337).
• Extended cluster tests up to 99 shards: (#345).

AI

• AI assistant guidelines: Added AGENTS.md and CLAUDE.md to document AI assistant contribution guidelines (#343).

Full Changelog: 2.2.1...2.2.2

What's Changed

New Features & Enhancements

• Key placeholder composition: The key placeholder can now be combined with other data within the same command argument, enabling more flexible and expressive command generation (#154).
• Crash handling & debugging improvements: Added crash handling and debugging support, along with automatic version metadata generation to improve diagnostics and observability (#328).
• Graceful shutdown with metrics: Improved signal handling to support graceful shutdown while ensuring metrics are properly reported (#325).

Developer Tooling & Build Improvements

• Sanitizer support:
  • Added AddressSanitizer (ASan) and LeakSanitizer (LSan) for CI and local development (#322).
  • Added ThreadSanitizer (TSan) and fixed identified data races (#323).
  • Added UndefinedBehaviorSanitizer (UBSan) support (#324).
• Build dependency cleanup: Removed the libpcre3-dev dependency from build and CI configurations (#318).
• Release packaging fix: Fixed permissions for APT release artifacts (#317).

Bug Fixes

• Fixed issues with random __data__ generation to ensure correct and consistent payload creation (#326).

Maintenance

• Updated copyright year to 2026 (#329).

What's Changed

New Features

• Add option to print and save all results when performing multiple test iterations by @Yuval-Ariel in #298
• Initial support for keys following zipfian by @lfsu-ali in #166
• Add URI flag to memtier_benchmark (compatible with redis-cli and redis-benchmark parsing) by @filipecosta90 in #311
• Enabled Zipfian key distribution for arbitrary commands by @filipecosta90 in #314

Improvements & Fixes

• Fixes to the CI workflow by @maxb-io in #307
• Remove ubuntu-20.04 from build-build matrix due to GH removal by @paulorsousa in #309
• Updated documentation by @mustansirali in #305
• Updated documentation by @kikitux in #302
• Improve the performance of imported_keylist deconstruction by @DarrenJiang13 in #239
• Add macOS installation instructions via Homebrew by @paulorsousa in #313

New Contributors

• @Yuval-Ariel made their first contribution in #298
• @maxb-io made their first contribution in #307
• @paulorsousa made their first contribution in #309
• @lfsu-ali made their first contribution in #166
• @mustansirali made their first contribution in #305
• @kikitux made their first contribution in #302
• @DarrenJiang13 made their first contribution in #239

Full Changelog: 2.1.4...2.2.0

What's Changed

• Revert LATENCY_HDR_SEC_SIGDIGTS to 2.
  Optimize summarize_current_second by using hdr_value_at_percentiles() instead of N x hdr_value_at_percentile(). by @filipecosta90 in #295

Full Changelog: 2.1.3...2.1.4

What's Changed

• Issue #285, Fix rate-limiting with cluster-mode by @YaacovHazan in #286

Full Changelog: 2.1.2...2.1.3

What's Changed

• Add .gitattributes file for better behavior on Windows-based systems by @DrEsteban in #266
• Create .dockerignore by @DrEsteban in #268
• Ensuring we produce a valid JSON in case of empty string and -nan by @filipecosta90 in #273

New Contributors

• @DrEsteban made their first contribution in #267

Full Changelog: 2.1.1...2.1.2

What's Changed

• Use SO_LINGER with timeout 0 to avoid thousands of server sockets in TIME_WAIT when using small reconnect intervals by @filipecosta90 in #260

Full Changelog: 2.1.0...2.1.1

New Features

• Add rate limiting to control the number of requests per second by @YaacovHazan in #237
• Enable specifying the tls protocol version to use via --tls-protocols argument by @filipecosta90 in #234
• List ingress and egress separately on JSON and CSV exports. Include BW and also raw values per second by @filipecosta90 in #246

Bug Fixes

• Issue #94, test hangs in cluster mode by @YaacovHazan in #230
• Avoid c++11 nullptr and use 0 on null comparison by @filipecosta90 in #236
• Fixed TLS --tls-protocols parsing. by @filipecosta90 in #241
• see #238, data import broken by @YaacovHazan in #240
• Fix upstream missing USE_TLS macro guard by @Alkaid-Benetnash in #242
• Fixed deprecated and casting build errors caught on recent compilers by @filipecosta90 in #248
• Fixed build for tls v1.3 on openssl v1.0.2. Added CI check by @filipecosta90 in #253
• Fixed last second metric rolling. Fixed totals json section missing the latency quantiles by @filipecosta90 in #251

New Contributors

• @Alkaid-Benetnash made their first contribution in #242

Full Changelog: 2.0.0...2.1.0

What's Changed

• TLS: Support chain certs in --cert. by @yossigo in #201
• Always print out stderr/out output on test failures. by @ushachar in #207
• Include keyspace range checks on flow tests by @filipecosta90 in #208
• Fix issue #211. Allow key_stddev and key_median options to be set values by @clkbug in #212
• Add alpine-based Dockerfile. by @yossigo in #214
• Support forcing of IPv4/IPv6 resolution. by @YaacovHazan in #215
• fix typo about expiry-range by @judeng in #219
• Issue #204, Disable READ/WRITE events if no requests sent by @YaacovHazan in #222
• Add --host (-h) command line option for the Server address. by @YaacovHazan in #224
• Enable arbitrary commands to be run on cluster mode by @filipecosta90 in #117

New Contributors

• @clkbug made their first contribution in #212
• @judeng made their first contribution in #219

Full Changelog: 1.4.0...2.0.0

What's Changed

• fix issue #128 zeros in ouptut by @YaacovHazan in #130
• fix issue #133, error when using --data-offset by @YaacovHazan in #134
• fix issue #132, endless loop by @YaacovHazan in #136
• enable full percentile spectrum analysis on latency by @filipecosta90 in #100
• Silence automake warning. by @yossigo in #137
• Add Debian packaging files. by @yossigo in #138
• Fix memory leaks involving hdr_histogram. by @yossigo in #140
• Add -V as short for --version by @hbina in #145
• Prevents the program from entering endless loop by @hbina in #144
• Added extra note to avoid unnecessary error by @AshishVarshneyy in #147
• fix issue #158, gaussian key-pattern on MAC OS by @YaacovHazan in #159
• Fix dropouts due to vector resize during long benchmarks by @JohnSully in #160
• Enable OpenSSL to load a configuration file during initialization by @slice4e in #168
• Pinning rltest to the last release prior to redis-py 4 as a requirement by @chayim in #170
• Correctly randomize value buffer by @caipengbo in #172
• Support benchmarking servers with IPv6 addresses by @shawn-higgins1 in #174
• Moved integration testing logic out of github actions and included testing section on Readme by @filipecosta90 in #176
• add support for resp3 by @YaacovHazan in #182
• A few build instructions clarifications. by @yossigo in #187
• Increased print precision of percentiles to single micro (before was 10 micros) by @filipecosta90 in #189
• Fixed memory usage increasing over time due to per second histogram usage by @filipecosta90 in #188
• Fix issue #123 Add object size unit in help by @YaacovHazan in #190

New Contributors

• @hbina made their first contribution in #145
• @AshishVarshneyy made their first contribution in #147
• @JohnSully made their first contribution in #160
• @slice4e made their first contribution in #168
• @chayim made their first contribution in #170
• @caipengbo made their first contribution in #172
• @shawn-higgins1 made their first contribution in #174

Full Changelog: 1.3.0...1.4.0