Sourced from puma's releases.

6.5.0 - Sky's Version

They say good things come to wait, and you've all had to wait a long time for 6.5.0 because @​nateberkopec had another daughter: Sky!

• Features

  • Print RUBY_DESCRIPTION when Puma starts (#3407)
  • Set the worker process count automatically when using WEB_CONCURRENCY=auto (#3439, #3437)
  • Mark as ractor-safe (#3486, #3422)
  • Add option enable_keep_alive. true mimics existing behavior, but now can use false to disable keepalive to reduce queue tail latency (#3496)
  • Add parameters to Puma methods to allow CI to change ENV in isolation (#3485)
  • Add ssl_ciphersuites option for TLSv1.3 ciphers (#3359, #3343)
  • You can now use --threads 5 or threads 5 to config max/min threads with a single number (used to need to say 5:5) (#3309)
  • Option to turn off systemd plugin (#3425, #3424)
  • Add on_stopped hook (#3411, #3380)

• Bugfixes

  • Handle blank environment variables when loading config (#3539)
  • lib/rack/handler/puma.rb - fix for rackup v1.0.1, adjust Gemfile (#3532, #3531)
  • null_io.rb - add external_encoding, set_encoding, binmode, binmode? (#3214)
  • Implement NullIO#seek and #pos to mimic IO (#3468)
  • add support in rack handler & fix regression in binder for linux abstract namespace sockets (#3508)
  • Use actual thread local for Puma::Server.current. (#3360)
  • client.rb - fix request chunked body handling (#3338, #3337)
  • Properly handle two requests seen in the initial buffer (#3332)
  • Fix response repeated status line when request is invalid or errors are raised (#3308, #3307)
  • Fix child processes not being reaped when Process.detach used (#3314, #3313)

• JRuby

  • Make HTTP length constants configurable (#3518)
  • Fixup jruby_restart.rb & launcher.rb to work with ARM64 macOS JRuby (#3467)

• Performance

  • Avoid checking if all workers reached timeout unless idle timeout is configured (#3341)
  • Request body - increase read size to 64 kB (#3548)
  • single mode skip wait_for_less_busy_worker (#3325)

• Refactor

  • A ton of CI/test improvements by @​MSP-Greg, as usual.
  • Add ThreadPool#stats and adjust Server#stats to use it (#3527)
  • normalize whitespace in worker stats string (#3513)
  • rack/handler/puma.rb - ssl - use start_with?, add test (#3510)
  • extconf.rb - add logging for OpenSSL versions (#3370)
  • Lazily require Puma::Rack::Builder (#3340)
  • Refactor: Constantize worker pipe request types (#3318)

• Docs

  • stats.md improvements (#3514)
  • control_cli.rb: Harmonize help message with bin/puma (#3434)
  • dsl.rb: Clarify a callback's argument (#3435)

... (truncated)

Sourced from puma's changelog.

6.5.0 / 2024-11-23

• Features

  • Print RUBY_DESCRIPTION when Puma starts (#3407)
  • Set the worker process count automatically when using WEB_CONCURRENCY=auto (#3439, #3437)
  • Mark as ractor-safe (#3486, #3422)
  • Add option enable_keep_alive. true mimics existing behavior, but now can use false to disable keepalive to reduce queue tail latency (#3496)
  • Add parameters to Puma methods to allow CI to change ENV in isolation (#3485)
  • Add ssl_ciphersuites option for TLSv1.3 ciphers (#3359, #3343)
  • You can now use --threads 5 or threads 5 to config max/min threads with a single number (used to need to say 5:5) (#3309)
  • Option to turn off systemd plugin (#3425, #3424)
  • Add on_stopped hook (#3411, #3380)

• Bugfixes

  • Handle blank environment variables when loading config (#3539)
  • lib/rack/handler/puma.rb - fix for rackup v1.0.1, adjust Gemfile (#3532, #3531)
  • null_io.rb - add external_encoding, set_encoding, binmode, binmode? (#3214)
  • Implement NullIO#seek and #pos to mimic IO (#3468)
  • add support in rack handler & fix regression in binder for linux abstract namespace sockets (#3508)
  • Use actual thread local for Puma::Server.current. (#3360)
  • client.rb - fix request chunked body handling (#3338, #3337)
  • Properly handle two requests seen in the initial buffer (#3332)
  • Fix response repeated status line when request is invalid or errors are raised (#3308, #3307)
  • Fix child processes not being reaped when Process.detach used (#3314, #3313)

• JRuby

  • Make HTTP length constants configurable (#3518)
  • Fixup jruby_restart.rb & launcher.rb to work with ARM64 macOS JRuby (#3467)

• Performance

  • Avoid checking if all workers reached timeout unless idle timeout is configured (#3341)
  • Request body - increase read size to 64 kB (#3548)
  • single mode skip wait_for_less_busy_worker (#3325)

• Refactor

  • A ton of CI/test improvements by @​MSP-Greg, as usual.
  • Add ThreadPool#stats and adjust Server#stats to use it (#3527)
  • normalize whitespace in worker stats string (#3513)
  • rack/handler/puma.rb - ssl - use start_with?, add test (#3510)
  • extconf.rb - add logging for OpenSSL versions (#3370)
  • Lazily require Puma::Rack::Builder (#3340)
  • Refactor: Constantize worker pipe request types (#3318)

• Docs

  • stats.md improvements (#3514)
  • control_cli.rb: Harmonize help message with bin/puma (#3434)
  • dsl.rb: Clarify a callback's argument (#3435)
  • lib/rack/handler/puma.rb - relocate and fixup module comment (#3495)

• 9e98151 v6.5.0 - Sky's Version
• 89740fb Request body - increase read size to 64 kB (#3548)
• 932f5d0 CI: test/test_request_invalid.rb - use TestPuma::PumaSocket, RFC 9112 (#3553)
• b444c10 Handle blank environment variables when loading config (#3539)
• fba741b Make HTTP length constants configurable for JRuby (#3518)
• 0255efd CI: remove test/helpers/config_file.rb, which modifies ENV (#3550)
• 450784a CI: fix TestIntegration#server_gets - until, not unless (#3549)
• 271e4d0 CI: remove unnecessary rake task test:all (#3543)
• 9e0dc2e [CI] test_puma_server.rb - add HTTP/1.0 & HTTP/1.1 checks thru to app env (#3...
• 23753d9 [CI] test_puma_server.rb - update & add tests for back-to-back requests (#3335)
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