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Delay Queue

seqdelay

High-performance delay queue powered by seqflow + Redis

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Time Wheel Engine

Powered by seqflow Disruptor. O(1) add/fire. 4.4M tasks/sec. 1ms precision.

Redis Persistence

Lua scripts for atomic state transitions. Standalone, Sentinel, or Cluster. Full recovery on restart.

Dual Mode

Embed as Go library with callbacks, or deploy as standalone HTTP service for any language.

Use Cases

Order auto-cancel (15 min unpaid)
Payment callback retry
Membership expiry reminder
Coupon expiration
Scheduled push notifications
Rate limit cooldown