Bump dalli from 3.2.8 to 5.0.6

[dependabot]

Bumps dalli from 3.2.8 to 5.0.6.

Release notes

Sourced from dalli's releases.

v5.0.6

Performance:

• Skip the cas-return flag on quiet meta_set requests (#1131)

  • In quiet mode memcached suppresses the ms response entirely, so the CAS requested by the c flag can never be read; sending it only added two bytes to every request
  • Applies to the bulk-write paths, where quiet sets are emitted: Dalli::Client#multi blocks and the pipelined setter
  • Extracted from #1130; thanks to Jianbin Chen for this contribution

• Reduce allocations in KeyRegularizer and multi-key request paths (#1120)

  • Decomposed KeyRegularizer#encode into separate needs_encoding? and encode calls so the common happy path avoids allocating an intermediate array for the two-element return value
  • Refactored multi_get/multi_set/multi_delete command generation into RequestFormatter to share its key-encoding helpers
  • Thanks to Jean Boussier for this contribution

• Reduce allocations in ResponseBuffer pipelined getk parsing (#1117)

  • process_single_getk_response was building a fresh array to return results alongside the updated offset; refactored to store the offset as the last element of the existing tokens array and pop it, saving one allocation per response
  • Also skips trailing nils in the token array
  • Thanks to Jean Boussier for this contribution

• Enable frozen string literals in RequestFormatter (#1118)

  • Frozen string literals had been inadvertently disabled; re-enabling reduces allocations by ~300,000 objects in a 10,000-iteration get_multi_cas benchmark (562 MB → 550 MB total allocated)
  • Thanks to Jean Boussier for this contribution

• Reduce allocations in ResponseProcessor#value_from_tokens (#1113)

  • token[1..].to_i was allocating a new string for every token parsed; replaced with in-place slice! followed by a token reset to avoid poisoning subsequent token comparisons
  • Saves 4 allocations per entry in get_multi_cas workloads (a hotspot for IdentityCache)
  • Thanks to Jean Boussier for this contribution

• Reduce allocations in common operation paths (#1111)

  • Use Symbol#name over Symbol#to_s to return a frozen string without allocation
  • Skip trace attribute hash construction when OpenTelemetry instrumentation is disabled
  • Use argument forwarding (...) in Client#perform and Threadsafe#request to avoid splat array allocation
  • Use match? in KeyRegularizer#encode to avoid MatchData object allocation
  • Reduces objects allocated by ~26% and memory by ~6% for a simple get workload
  • Thanks to Jean Boussier for this contribution

• Fix pathological memory behavior in ResponseBuffer (#1114)

  • compact_if_needed was intended to reclaim memory by slicing off consumed bytes, but buffer.byteslice(@offset..) on an unfrozen string causes Ruby to allocate a hidden third string as the copy-on-write owner rather than freeing the original
  • Redesigns buffer management to pass reusable buffer objects directly to read/read_nonblock, avoiding reallocation on each response read
  • Reduces allocations from ~2.38 GB to ~649 MB in a get_multi_cas benchmark over 10,000 iterations
  • Accompanied by new unit tests for ResponseBuffer (#1115)
  • Thanks to Jean Boussier for this contribution

Features:

• delete_multi now returns the number of keys found and deleted (#1126)
  • Previously the return value was unspecified; callers (e.g. Rails, see rails/rails#58071) had no way to tell how many keys were actually removed
  • The count is derived from the meta protocol's quiet-mode delete responses with no extra round-trips: successful deletes are suppressed while misses report NF, so any response received before the terminator is a key that was not deleted
  • The single-server fast path now shares the pipelined path's bounded retry on transient (RetryableNetworkError) network errors, so both paths behave consistently; the returned count is best-effort and may under-report if a network error triggers a retry, since keys deleted before the error are not recounted
  • Thanks to Iliana Hadzhiatanasova for this contribution

... (truncated)

Changelog

Sourced from dalli's changelog.

5.0.6

Performance:

• Skip the cas-return flag on quiet meta_set requests (#1131)

  • In quiet mode memcached suppresses the ms response entirely, so the CAS requested by the c flag can never be read; sending it only added two bytes to every request
  • Applies to the bulk-write paths, where quiet sets are emitted: Dalli::Client#multi blocks and the pipelined setter
  • Extracted from #1130; thanks to Jianbin Chen for this contribution

• Reduce allocations in KeyRegularizer and multi-key request paths (#1120)

  • Decomposed KeyRegularizer#encode into separate needs_encoding? and encode calls so the common happy path avoids allocating an intermediate array for the two-element return value
  • Refactored multi_get/multi_set/multi_delete command generation into RequestFormatter to share its key-encoding helpers
  • Thanks to Jean Boussier for this contribution

• Reduce allocations in ResponseBuffer pipelined getk parsing (#1117)

  • process_single_getk_response was building a fresh array to return results alongside the updated offset; refactored to store the offset as the last element of the existing tokens array and pop it, saving one allocation per response
  • Also skips trailing nils in the token array
  • Thanks to Jean Boussier for this contribution

• Enable frozen string literals in RequestFormatter (#1118)

  • Frozen string literals had been inadvertently disabled; re-enabling reduces allocations by ~300,000 objects in a 10,000-iteration get_multi_cas benchmark (562 MB → 550 MB total allocated)
  • Thanks to Jean Boussier for this contribution

• Reduce allocations in ResponseProcessor#value_from_tokens (#1113)

  • token[1..].to_i was allocating a new string for every token parsed; replaced with in-place slice! followed by a token reset to avoid poisoning subsequent token comparisons
  • Saves 4 allocations per entry in get_multi_cas workloads (a hotspot for IdentityCache)
  • Thanks to Jean Boussier for this contribution

• Reduce allocations in common operation paths (#1111)

  • Use Symbol#name over Symbol#to_s to return a frozen string without allocation
  • Skip trace attribute hash construction when OpenTelemetry instrumentation is disabled
  • Use argument forwarding (...) in Client#perform and Threadsafe#request to avoid splat array allocation
  • Use match? in KeyRegularizer#encode to avoid MatchData object allocation
  • Reduces objects allocated by ~26% and memory by ~6% for a simple get workload
  • Thanks to Jean Boussier for this contribution

• Fix pathological memory behavior in ResponseBuffer (#1114)

  • compact_if_needed was intended to reclaim memory by slicing off consumed bytes, but buffer.byteslice(@offset..) on an unfrozen string causes Ruby to allocate a hidden third string as the copy-on-write owner rather than freeing the original
  • Redesigns buffer management to pass reusable buffer objects directly to read/read_nonblock, avoiding reallocation on each response read
  • Reduces allocations from ~2.38 GB to ~649 MB in a get_multi_cas benchmark over 10,000 iterations
  • Accompanied by new unit tests for ResponseBuffer (#1115)
  • Thanks to Jean Boussier for this contribution

Features:

• delete_multi now returns the number of keys found and deleted (#1126)
  • Previously the return value was unspecified; callers (e.g. Rails, see rails/rails#58071) had no way to tell how many keys were actually removed
  • The count is derived from the meta protocol's quiet-mode delete responses with no extra round-trips: successful deletes are suppressed while misses report NF, so any response received before the terminator is a key that was not deleted
  • The single-server fast path now shares the pipelined path's bounded retry on transient (RetryableNetworkError) network errors, so both paths behave consistently; the returned count is best-effort and may under-report if a network error triggers a retry, since keys deleted before the error are not recounted

... (truncated)

Commits

• 6c8dabe Merge pull request #1138 from petergoldstein/release/5.0.6
• f740e6a Credit Dan Mayer for the original non-StandardError teardown fix
• b833b05 Prepare 5.0.6 release
• 4e83dd6 Drop the dependabot entry from the CHANGELOG
• 3ba0937 Merge pull request #1137 from petergoldstein/changelog/1128-1129-1131-1132-11...
• 95cc90c Add CHANGELOG entries for #1135 and #1136
• 87ac35f Add CHANGELOG entries for #1124, #1128, #1129, #1131, #1132, #1133, #1134
• 3e5fc76 Merge pull request #1136 from petergoldstein/fix/teardown-on-non-standard-error
• e7b88b0 Merge pull request #1135 from petergoldstein/fix/exact-length-reads
• 96ff9af Tear down the connection when a non-StandardError aborts a request
• Additional commits viewable in compare view