Changelog & Release Notes

All notable changes to bunqueue are documented here.

[2.4.7] - 2026-02-14

Performance

• Event-driven cron scheduler - Replaced 1s setInterval polling with precise setTimeout that wakes exactly when the next cron is due. Zero wasted ticks between executions:

  Scenario	Before	After
  1 cron every 5min	300 ticks/5min (299 wasted)	1 tick/5min
  0 crons registered	1 tick/sec (all wasted)	0 ticks
  Cron in 3 hours	10,800 wasted ticks	1 tick at exact time

• A 60s setInterval safety fallback catches edge cases (timer drift, missed events). Zero functional changes, zero API changes.

Added

• scripts/embedded/test-cron-event-driven.ts - Operational test verifying cron timer precision

[2.4.6] - 2026-02-14

Performance

• Event-driven dependency resolution - Replaced 100ms setInterval polling with microtask-coalesced flush triggered on job completion. Dependency chain latency drops from hundreds of milliseconds to microseconds:

  Scenario	Before (P50)	After (P50)	Speedup
  Single dep (A→B)	100.05ms	12.5µs	~8,000x
  Chain (4 levels)	300.43ms	28.2µs	~10,700x
  Fan-out (1→5)	100.11ms	31.0µs	~3,200x

• The previous 100ms interval is now a 30s safety fallback. Zero functional changes, zero API changes.

• Bonus: less CPU at idle (no more 10 calls/sec to processPendingDependencies when queue is empty).

Added

• src/benchmark/dependency-latency.bench.ts - Benchmark for dependency chain resolution latency
• src/application/taskErrorTracking.ts - Extracted error tracking for reuse across modules

[2.4.5] - 2026-02-14

Fixed

• Backoff jitter - calculateBackoff() now applies jitter to prevent thundering herd when many jobs retry simultaneously. Exponential backoff uses ±50% jitter, fixed backoff uses ±20% jitter around the configured delay.
• Backoff max cap - Retry delays are now capped at 1 hour (DEFAULT_MAX_BACKOFF = 3,600,000ms) by default. Previously, attempt 20 with 1000ms base produced ~12 day delays. Configurable via BackoffConfig.maxDelay.
• Recovery backoff bypass - Startup recovery now uses calculateBackoff(job) instead of an inline exponential formula, correctly respecting backoffConfig (e.g., { type: 'fixed', delay: 5000 } was ignored during recovery).

[2.4.3] - 2026-02-14

Fixed

• Batch push now wakes all waiting workers - pushJobBatch previously called notify() only once, causing only 1 of N waiting workers to wake up immediately. Others had to wait for their poll timeout (up to 30s with long-poll). Now each inserted job triggers a separate notification, waking all idle workers instantly.
• Pending notifications counter - WaiterManager.pendingNotification was a boolean flag, silently losing notifications when multiple pushes occurred with no waiting workers. Changed to an integer counter (pendingNotifications) so each notification is tracked and consumed individually.

[2.4.2] - 2026-02-13

Added

• CPU-Intensive Workers guide - New dedicated docs page for handling CPU-heavy jobs over TCP
  • Explains the ping health check failure chain that causes job loss after ~90s of CPU load
  • Connection tuning: pingInterval: 0, commandTimeout: 60000
  • Non-blocking CPU patterns with await Bun.sleep(0) yield
  • Default timeouts reference table
  • SandboxedWorker as alternative for truly CPU-bound work
• CPU stress test script - scripts/stress-cpu-intensive.ts (500 jobs, 5 CPU task types, concurrency 3)

[2.4.1] - 2026-02-12

Changed

• Codebase refactoring - Split 6 large files exceeding 300-line limit into smaller focused modules
  • src/shared/lru.ts (643 lines) → barrel re-export + 5 modules: lruMap.ts, lruSet.ts, boundedSet.ts, boundedMap.ts, ttlMap.ts
  • src/client/jobConversion.ts (499 lines) → 269 lines + jobConversionTypes.ts, jobConversionHelpers.ts
  • src/domain/queue/shard.ts (554 lines) → 484 lines + waiterManager.ts, shardCounters.ts
  • src/application/queueManager.ts (820 lines) → 774 lines (moved getQueueJobCounts to statsManager.ts)
  • src/client/worker/worker.ts (843 lines) → 596 lines + workerRateLimiter.ts, workerHeartbeat.ts, workerPull.ts
• All barrel re-exports preserve backward compatibility — zero breaking changes
• 12 new files created, 6 files modified

[2.4.0] - 2026-02-11

Added

• Auto-batching for queue.add() over TCP - Transparently batches concurrent add() calls into PUSHB commands
  • Zero overhead for sequential await usage (flush immediately when idle)
  • ~3x speedup for concurrent adds (buffers during in-flight flush)
  • Configurable: autoBatch: { maxSize: 50, maxDelayMs: 5 } (defaults)
  • Durable jobs bypass the batcher (sent as individual PUSH)
  • Disable with autoBatch: { enabled: false }
• 306 new tests covering previously untested modules

[2.3.1] - 2026-02-08

Fixed

• Non-numeric job IDs - Allow non-numeric job IDs in HTTP routes
• Updated HTTP route tests to match non-numeric job ID support

[2.3.0] - 2026-02-06

Added

• Latency Histograms - Prometheus-compatible histograms for push, pull, and ack operations
  • Fixed bucket boundaries: 0.1ms to 10,000ms (15 buckets)
  • Full exposition format: _bucket{le="..."}, _sum, _count
  • Percentile calculation (p50, p95, p99) for SLO tracking
  • New files: src/shared/histogram.ts, src/application/latencyTracker.ts
• Per-Queue Metric Labels - Prometheus labels for per-queue drill-down
  • bunqueue_queue_jobs_waiting{queue="..."} (waiting, delayed, active, dlq)
  • Enables Grafana filtering and alerting per queue name
• Throughput Tracker - Real-time EMA-based rate tracking
  • pushPerSec, pullPerSec, completePerSec, failPerSec
  • O(1) per observation, zero GC pressure
  • Replaces placeholder zeros in /stats endpoint
  • New file: src/application/throughputTracker.ts
• LOG_LEVEL Runtime Filtering - LOG_LEVEL env var now works at runtime
  • Levels: debug, info (default), warn, error
  • Priority-based filtering with early return
• 39 new telemetry tests across 5 test files:
  • test/histogram.test.ts (9 tests)
  • test/latencyTracker.test.ts (7 tests)
  • test/perQueueMetrics.test.ts (7 tests)
  • test/throughputTracker.test.ts (7 tests)
  • test/telemetry-e2e.test.ts (9 E2E integration tests)

Changed

• /stats endpoint now returns real throughput and latency values
• Monitoring docs updated with per-queue metrics, histogram examples, and logging section
• HTTP API docs updated with new Prometheus output format

Performance

• Telemetry overhead: ~0.003% (~25ns per operation via Bun.nanoseconds())
• Benchmark results unchanged: 197K push/s (embedded), 39K push/s (TCP)

[2.1.8] - 2026-02-06

Fixed

• pushJobBatch event emission - pushJobBatch was silently dropping event broadcasts, causing subscribers and webhooks to miss all batch-pushed jobs. Added broadcast loop after batch insert to match single pushJob behavior.

Added

• 4 regression tests for batch push event emission fix

Changed

• Navbar simplified to show only logo without title text

[2.1.7] - 2026-02-05

Fixed

• WriteBuffer silent data loss during shutdown - WriteBuffer.stop() swallowed flush errors and silently dropped buffered jobs. Added reportLostJobs() to notify via onCriticalError callback when jobs cannot be persisted during shutdown.
• Queue name consistency in TCP tests - Fixed port hardcoding in queue-name-consistency test.

Added

• 2,664 new tests across 37 files - Comprehensive test coverage increase from 1,083 to 3,747 tests (+246%) with zero failures. Coverage spans core operations, data structures, managers, client TCP layer, server handlers, domain types, MCP handlers, and more.

[2.1.6] - 2026-02-05

Fixed

• S3 backup hardening - 10 bug fixes with 33 new tests:
  • Replace silent catch in cleanup with proper logging
  • Reject retention < 1 and intervalMs < 60s in config validation
  • Validate SQLite magic bytes before restore to prevent data corruption
  • Guard cleanup against retention=0 deleting all backups
  • Add S3 list pagination to handle >100 backups
  • Run WAL checkpoint before backup to include uncheckpointed data
  • Replace blocking gzipSync/gunzipSync with async CompressionStream
• Flaky sandboxedWorker concurrent test - Poll all 4 job results in parallel instead of sequentially to avoid exceeding the 5s test timeout.

Added

• 33 new S3 backup tests covering config validation, backup/restore operations, cleanup, and manager lifecycle
• Documentation for gzip compression, SHA256 checksums, .meta.json files, scheduling details, AWS env var aliases, and restore safety notes

[2.1.5] - 2026-02-05

Fixed

• uncaughtException and unhandledRejection handlers - Previously, any uncaught error in background tasks or unhandled promise rejections would crash the server immediately without cleanup (write buffer not flushed, SQLite not closed, locks not released). Now the server performs graceful shutdown: logs the error with stack trace, stops TCP/HTTP servers, waits for active jobs, flushes the write buffer, and exits cleanly.
• Broken GitHub links in documentation (missing /bunqueue in paths)
• Stray separator in index.mdx causing build error

Changed

• Migrated documentation from GitHub Pages to Vercel deployment
• SEO optimization across all 45 pages with improved titles and descriptions
• Documentation errors fixed, missing content added, and navbar modernized

[2.1.4] - 2026-02-05

Changed

• README split into Embedded and Server mode sections
• Added Docker server mode quick start with persistence documentation

[2.1.3] - 2026-02-05

Added

• Type safety improvements across client SDK
• Deployment modes section and fixed quick start examples in documentation

Changed

• README improved with use cases, benchmarks, and BullMQ comparison

[2.1.2] - 2026-02-04

Fixed

• Queue name consistency - Fixed benchmark tests using different queue names for worker and queue in both embedded and TCP modes

Changed

• Stats interval changed to 5 minutes with timestamp
• Removed verbose info/warn logs, keeping only errors
• Downgraded TypeScript to 5.7.3 for CI compatibility

Added

• Queue name consistency tests to prevent regression
• Monitoring documentation added to sidebar Production section

[2.1.1] - 2026-02-04

Added

• Prometheus + Grafana Monitoring Stack - Complete observability setup:
  • Docker Compose profile for one-command monitoring deployment
  • Pre-configured Prometheus scraping with 5s interval
  • Comprehensive Grafana dashboard with 6 panel rows:
    • Overview: Waiting, Delayed, Active, Completed, DLQ, Workers, Cron, Uptime
    • Throughput: Jobs/sec graphs, queue depth over time
    • Success/Failure: Rate gauges, completed vs failed charts
    • Workers: Count, throughput, utilization gauge
    • Webhooks & Cron: Status and lifetime totals
    • Alerts: Visual indicators for DLQ, failure rate, backlog, workers
  • 8 pre-configured Prometheus alert rules:
    • BunqueueDLQHigh - DLQ > 100 for 5m (critical)
    • BunqueueHighFailureRate - Failure > 5% for 5m (warning)
    • BunqueueQueueBacklog - Waiting > 10k for 10m (warning)
    • BunqueueNoWorkers - No workers with waiting jobs (critical)
    • BunqueueServerDown - Server unreachable (critical)
    • BunqueueLowThroughput - < 1 job/s for 10m (warning)
    • BunqueueWorkerOverload - Utilization > 95% (warning)
    • BunqueueJobsStuck - Active jobs, no completions (warning)
• Monitoring Documentation - New guide at /guide/monitoring/

Changed

• Docker Compose now supports --profile monitoring for optional stack

[2.1.0] - 2026-02-04

Performance

• TCP Pipelining - Major throughput improvement for TCP client operations:
  • Client-side: Multiple commands in flight per connection (up to 100 by default)
  • Server-side: Parallel command processing with Promise.all()
  • reqId-based response matching for correct command-response pairing
  • 125,000 ops/sec in pipelining benchmarks (vs ~20,000 before)
  • Configurable via pipelining: boolean and maxInFlight: number options
• SQLite indexes for high-throughput operations - Added 4 new indexes for 30-50% faster queries:
  • idx_jobs_state_started: Stall detection now O(log n) instead of O(n) table scan
  • idx_jobs_group_id: Fast lookup for group operations
  • idx_jobs_pending_priority: Compound index for priority-ordered job retrieval
  • idx_dlq_entered_at: DLQ expiration cleanup now O(log n)
• Date.now() caching in pull loop - Reduced syscalls by caching timestamp per iteration (+3-5% throughput)

Added

• Hello command for protocol version negotiation (cmd: 'Hello')
• Protocol version 2 with pipelining capability support
• Semaphore utility for server-side concurrency limiting (src/shared/semaphore.ts)
• Comprehensive pipelining test suites:
  • test/protocol-reqid.test.ts - 7 tests for reqId handling
  • test/client-pipelining.test.ts - 7 tests for client pipelining
  • test/server-pipelining.test.ts - 7 tests for server parallel processing
  • test/backward-compat.test.ts - 10 tests for backward compatibility
• Fair benchmark comparison (bench/comparison/run.ts):
  • Both bunqueue and BullMQ use identical parallel push strategy
  • Queue cleanup with obliterate() between tests
  • Results: 1.3x Push, 3.2x Bulk Push, 1.7x Process vs BullMQ
• Comprehensive benchmark (bench/comprehensive.ts):
  • Embedded vs TCP mode comparison at scales [1K, 5K, 10K, 50K]
  • Log suppression for clean output
  • Peak results: 287K ops/sec (Embedded Bulk), 149K ops/sec (TCP Bulk)
  • Embedded mode is 2-4x faster than TCP across all operations
• New ConnectionOptions - Added pingInterval, commandTimeout, pipelining, maxInFlight to public API

Fixed

• SQLITE_BUSY under high concurrency - Added PRAGMA busy_timeout = 5000 to wait for locks instead of failing immediately
• “Database has closed” errors during shutdown - Added stopped flag to WriteBuffer to prevent flush attempts after stop()
• Critical: Worker pendingJobs race condition - Concurrent tryProcess() calls could overwrite each other’s job buffers, causing ~30% job loss under high concurrency. Now preserves existing buffered jobs when pulling new batches.
• Connection options not passed through - Worker, Queue, and FlowProducer now correctly pass pingInterval, commandTimeout, pipelining, and maxInFlight options to the TCP connection pool.

Changed

• Schema version bumped to 5 (auto-migrates existing databases)
• TCP client now includes reqId in all commands for response matching
• Server processes multiple frames in parallel (max 50 concurrent per connection)
• Documentation: Rewrote comparison page with real benchmark data and methodology explanation

[2.0.9] - 2026-02-03

Fixed

• Critical: Memory leak in EventsManager - Cancelled waiters in waitForJobCompletion() were never removed from the completionWaiters map on timeout. Now properly cleaned up when timeout fires.
• Critical: Lost notification TOCTOU race - Fixed race condition in pull.ts where notify() could fire between tryPullFromShard() returning null and waitForJob() being called. Added pendingNotification flag to Shard to capture notifications when no waiters exist.
• Critical: WriteBuffer data loss - Added exponential backoff (100ms → 30s), max 10 retries, critical error callback, stopGracefully() method, and enhanced error callback with retry information. Previously, persistent errors caused infinite retries and shutdown lost pending jobs.
• Critical: CustomIdMap race condition - Concurrent pushes with same customId could create duplicates. Moved customIdMap check inside shard write lock for atomic check-and-insert.

Added

• Comprehensive test suites for all bug fixes:
  • test/bug-memory-leak-waiters.test.ts - 5 tests verifying memory leak fix
  • test/bug-lost-notification.test.ts - 4 tests verifying notification fix
  • test/bug-writebuffer-dataloss.test.ts - 10 tests verifying WriteBuffer fix
  • test/bug-verification-remaining.test.ts - 7 tests verifying CustomId fix and JS concurrency model

[2.0.3] - 2026-02-02

Changed

• Major refactor: Split queue.ts into modular architecture (1955 → 485 lines)
  • Follows single responsibility principle with 14 focused modules
  • New modules: operations/add.ts, operations/counts.ts, operations/query.ts, operations/management.ts, operations/cleanup.ts, operations/control.ts
  • New modules: jobMove.ts, jobProxy.ts, bullmqCompat.ts, scheduler.ts, dlq.ts, stall.ts, rateLimit.ts, deduplication.ts, workers.ts, queueTypes.ts
  • All 894 unit tests, 25 TCP test suites, and 32 embedded test suites pass

Fixed

• getJob() now properly awaits async manager.getJob() call
• getJobCounts() now uses queue-specific counts instead of global stats
• promoteJobs() implements correct iteration over delayed jobs
• addBulk() properly passes BullMQ v5 options (lifo, stackTraceLimit, keepLogs, etc.)
• toPublicJob() used for full job options support in getJob()
• extendJobLock() passes token parameter correctly

[2.0.2] - 2026-02-02

Fixed

• Critical: Complete recovery logic for deduplication after restart - Fixed all recovery scenarios that caused duplicate jobs after server restart:
  • jobId deduplication (customIdMap) - Now properly populated on recovery
  • uniqueKey TTL deduplication - Now restored with TTL settings via registerUniqueKeyWithTtl()
  • Dependency recovery - Now checks SQLite job_results table (not just in-memory completedJobs)
  • Counter consistency - Fixed incrementQueued() only called for main queue jobs, not waitingDeps

Added

• loadCompletedJobIds() method in SQLite storage for dependency recovery
• hasResult() method to check if job result exists in SQLite
• Comprehensive recovery test suite (test/recoveryLogic.test.ts) with 8 tests covering all scenarios

[2.0.1] - 2026-02-02

Fixed

• Critical: jobId deduplication not working after restart - The customIdMap was not populated when recovering jobs from SQLite on server startup. This caused getDeduplicationJobId() to return null and allowed duplicate jobs with the same jobId to be created.

[2.0.0] - 2026-02-02

Added

• Complete BullMQ v5 API Compatibility - Full feature parity with BullMQ v5
  • Worker Advanced Methods
    • rateLimit(expireTimeMs) - Apply rate limiting to worker
    • isRateLimited() - Check if worker is currently rate limited
    • startStalledCheckTimer() - Start stalled job check timer
    • delay(ms, abortController?) - Delay worker processing with optional abort
  • Job Advanced Methods
    • discard() - Mark job as discarded
    • getFailedChildrenValues() - Get failed children job values
    • getIgnoredChildrenFailures() - Get ignored children failures
    • removeChildDependency() - Remove child dependency from parent
    • removeDeduplicationKey() - Remove deduplication key
    • removeUnprocessedChildren() - Remove unprocessed children jobs
  • JobOptions
    • continueParentOnFailure - Continue parent job when child fails
    • ignoreDependencyOnFailure - Ignore dependency on failure
    • timestamp - Custom job timestamp
  • DeduplicationOptions
    • extend - Extend TTL on duplicate
    • replace - Replace existing job on duplicate
• Comprehensive Test Coverage - 27 unit tests + 32 embedded script tests for new features

Changed

• Major version bump to 2.0.0 reflecting complete BullMQ v5 compatibility
• Updated TypeScript types for all new features

[1.9.9] - 2026-02-01

Added

• Comprehensive Functional Test Suite - 28 new test files covering all major features
  • 14 embedded mode tests + 14 TCP mode tests
  • Tests for: advanced DLQ, job management, monitoring, rate limiting, stall detection, webhooks, queue groups, and more
  • All 24 embedded test suites pass (143/143 individual tests)

Changed

• BullMQ-Style Idempotency - jobId option now returns existing job instead of throwing error
  • Duplicate job submissions are idempotent (same behavior as BullMQ)
  • Cleaner handling of retry scenarios without error handling
• Improved documentation for jobId deduplication behavior

Fixed

• Embedded test suite now properly uses embedded mode (was incorrectly trying TCP)
• Fixed getJobCounts() in tests to use queue-specific getJobs() method
• Fixed async getJob() calls in job management tests
• Fixed PROMOTE, CHANGE PRIORITY, and MOVE TO DELAYED test logic

[1.9.8] - 2026-01-31

Changed

• msgpackr Binary Protocol - Switched TCP protocol from JSON to msgpackr binary
  • ~30% faster serialization/deserialization
  • Smaller message sizes

[1.9.6] - 2026-01-31

Added

• Durable Writes - New durable: true option for critical jobs
  • Bypasses write buffer for immediate disk persistence
  • Guarantees no data loss on process crash
  • Use for payments, orders, and critical events

Changed

• Reduced write buffer flush interval from 50ms to 10ms
  • Smaller data loss window for non-durable jobs
  • Better balance between throughput and safety

[1.9.4] - 2026-01-31

Added

• 5 BullMQ-Compatible Features
  • Timezone support for cron jobs - IANA timezones (e.g., “Europe/Rome”, “America/New_York”)
  • getCountsPerPriority() - Get job counts grouped by priority level
  • getJobs() with pagination - Filter by state, paginate with start/end, sort with asc
  • retryCompleted() - Re-queue completed jobs for reprocessing
  • Advanced deduplication - TTL-based unique keys with extend and replace strategies

Changed

• Documentation improvements
  • Clear comparison table for Embedded vs TCP Server modes
  • Danger box warning about mixed modes causing “Command timeout” error
  • Added “Connecting from Client” section to Server guide

[1.9.3] - 2026-01-31

Added

• Unix Socket Support - TCP and HTTP servers can now bind to Unix sockets
  • Configure via TCP_SOCKET_PATH and HTTP_SOCKET_PATH environment variables
  • CLI flags --tcp-socket and --http-socket
  • Lower latency for local connections
• Socket status line in startup banner

Fixed

• Test alignment for shard drain return type

[1.9.2] - 2026-01-30

Fixed

• Critical Memory Leak - Resolved temporalIndex leak causing 5.5M object retention after 1M jobs
  • Added cleanOrphanedTemporalEntries() method to Shard
  • Memory now properly released after job completion with removeOnComplete: true
  • heapUsed drops to ~6MB after processing (vs 264MB before fix)

Changed

• Improved error logging in ackBatcher flush operations

[1.9.1] - 2026-01-29

Added

• Two-Phase Stall Detection - BullMQ-style stall detection to prevent false positives
  • Jobs marked as candidates on first check, confirmed stalled on second
  • Prevents requeuing jobs that complete between checks
• stallTimeout support in client push options
• Advanced health checks for TCP connections

Fixed

• Defensive checks and cleanup for TCP pool and worker
• Server banner alignment between CLI and main.ts

Changed

• Modularized client code into separate TCP, Worker, Queue, and Sandboxed modules

[1.9.0] - 2026-01-28

Added

• TCP Client - High-performance TCP client for remote server connections
  • Connection pooling with configurable pool size
  • Heartbeat keepalive mechanism
  • Batch pull/ACK operations (PULLB, ACKB with results)
  • Long polling support
  • Ping/pong health checks
• 4.7x faster push throughput with optimized TCP client

Changed

• Connection pool enabled by default for TCP clients
• Improved ESLint compliance across TCP client code

[1.6.8] - 2026-01-27

Fixed

• Renamed bunq to bunqueue in Dockerfile
• CLI version now read dynamically from package.json

Changed

• Centralized version in shared/version.ts

[1.6.7] - 2026-01-26

Added

• Dynamic version badge in documentation
• Mobile-responsive layout improvements
• Comprehensive stress tests

[1.6.6] - 2026-01-25

Fixed

• Counter updates when recovering jobs from SQLite on restart

[1.6.5] - 2026-01-24

Fixed

• Production readiness improvements with critical fixes

[1.6.4] - 2026-01-23

Fixed

• SQLite persistence for DLQ entries
• Client SDK persistence issues

[1.6.3] - 2026-01-22

Added

• MCP Server - Model Context Protocol server for AI assistant integration
  • Queue management tools for Claude, Cursor, and other AI assistants
  • BigInt serialization handling in stats

Fixed

• Deployment guide documentation corrections

[1.6.2] - 2026-01-21

Added

• SandboxedWorker - Isolated worker processes for crash protection
• Hono and Elysia integration guides
• Section-specific OG images and sitemap

Changed

• Enhanced SEO with Open Graph and Twitter meta tags
• Improved mobile responsiveness in documentation

[1.6.1] - 2026-01-20

Added

• Bunny ASCII art in server startup and CLI help
• Professional benchmark charts using QuickChart.io
• BullMQ vs bunqueue comparison benchmarks

Changed

• Optimized event subscriptions and batch operations
• Replaced Math.random UUID with Bun.randomUUIDv7 (10x faster)
• High-impact algorithm optimizations

[1.6.0] - 2026-01-19

Added

• Stall Detection - Automatic recovery of unresponsive jobs
  • Configurable stall interval and max stalls
  • Grace period after job start
  • Automatic retry or move to DLQ
• Advanced DLQ - Enhanced Dead Letter Queue
  • Full metadata (reason, error, attempt history)
  • Auto-retry with exponential backoff
  • Filtering by reason, age, retriability
  • Statistics endpoint
  • Auto-purge expired entries
• Worker Heartbeats - Configurable heartbeat interval
• Repeatable Jobs - Support for recurring jobs with intervals or limits
• Flow Producer - Parent-child job relationships
• Queue Groups - Bulk operations across multiple queues

Changed

• Updated banner to “written in TypeScript”
• Version now read from package.json dynamically

Fixed

• DLQ entry return type consistency

[1.5.0] - 2026-01-15

Added

• S3 backup with configurable retention
• Support for Cloudflare R2, MinIO, DigitalOcean Spaces
• Backup CLI commands (now, list, restore, status)

Changed

• Improved backup compression
• Better error messages for S3 configuration

[1.4.0] - 2026-01-10

Added

• Rate limiting per queue
• Concurrency limiting per queue
• Prometheus metrics endpoint
• Health check endpoint

Changed

• Optimized batch operations (3x faster)
• Reduced memory usage for large queues

[1.3.0] - 2026-01-05

Added

• Cron job scheduling
• Webhook notifications
• Job progress tracking
• Job logs

Fixed

• Memory leak in event listeners
• Race condition in batch acknowledgment

[1.2.0] - 2025-12-28

Added

• Priority queues
• Delayed jobs
• Retry with exponential backoff
• Job timeout

Changed

• Improved SQLite schema with indexes
• Better error handling

[1.1.0] - 2025-12-20

Added

• TCP protocol for high-performance clients
• HTTP API with WebSocket support
• Authentication tokens
• CORS configuration

[1.0.0] - 2025-12-15

Added

• Initial release
• Queue and Worker classes
• SQLite persistence with WAL mode
• Basic DLQ support
• CLI for server and client operations