Polling
A pattern in which the client actively queries the server for task status at fixed intervals. It is simple to implement and offers good compatibility, but introduces invalid requests and latency.
Timeline (last 90 days)
Event-driven synchronization can significantly reduce idle-spinning costs in agent orchestration, but it depends on reliable parsing of terminal state; if a certain harness's output format is nonstandard, the monitor may miss or misjudge the state.
Compared with polling, a Webhook does not require the receiver to repeatedly query the data source at fixed intervals, so latency is lower and resource overhead is smaller.
The article recommends using polling as the primary approach for slow AI jobs, supplemented by a backoff strategy (gradually lengthening the interval) to balance real-time responsiveness and server load.
Polling means the client actively queries job status from the server at fixed intervals; it is simple to implement and broadly compatible, but generates many wasted requests and has latency, while subscription uses server push via WebSocket or SSE and is highly real-time but requires maintaining long connections, which is less friendly to mobile and weak networks.
In polling scenarios for slow AI jobs, idempotency means every status query changes neither the job state nor triggers a new generation, so the client can safely refresh at high frequency.
There is no faster notification method than polling when bidding, so agents can only poll open intents at fixed intervals and do other things in between.
The video generation API uses a polling mechanism: it first returns a polling URL, the client checks the status every 15 seconds, and once complete, downloads the video content from a signed URL.
The polling approach has low implementation cost, but frequent empty polling brings invalid load; long polling can reduce idle spinning, yet it is still limited by connection timeouts and interruptions at the proxy layer, and for scenarios where a reply only comes after three hours, the polling window setting itself is a challenge.
Polling is the receiver periodically querying the source system on its own; it is more reliable but has latency and additional overhead.
Polling at a fixed interval has two problems: when there are many tasks it causes a large number of invalid requests that consume quota and may even trigger rate limiting; when tasks take a long time it may lengthen the total waiting time
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All Facts (15)
成熟的系统通常采用Webhook加轮询兜底的双重机制来确保任务状态获取的可靠性
85%UnverifiedEvent-driven synchronization can significantly reduce idle-spinning costs in agent orchestration, but it depends on reliable parsing of terminal state; if a certain harness's output format is nonstandard, the monitor may miss or misjudge the state.
50%UnverifiedCompared with polling, a Webhook does not require the receiver to repeatedly query the data source at fixed intervals, so latency is lower and resource overhead is smaller.
50%UnverifiedThe article recommends using polling as the primary approach for slow AI jobs, supplemented by a backoff strategy (gradually lengthening the interval) to balance real-time responsiveness and server load.
50%UnverifiedIn polling scenarios for slow AI jobs, idempotency means every status query changes neither the job state nor triggers a new generation, so the client can safely refresh at high frequency.
50%UnverifiedPolling means the client actively queries job status from the server at fixed intervals; it is simple to implement and broadly compatible, but generates many wasted requests and has latency, while subscription uses server push via WebSocket or SSE and is highly real-time but requires maintaining long connections, which is less friendly to mobile and weak networks.
50%UnverifiedThere is no faster notification method than polling when bidding, so agents can only poll open intents at fixed intervals and do other things in between.
50%UnverifiedThe video generation API uses a polling mechanism: it first returns a polling URL, the client checks the status every 15 seconds, and once complete, downloads the video content from a signed URL.
50%UnverifiedThe polling approach has low implementation cost, but frequent empty polling brings invalid load; long polling can reduce idle spinning, yet it is still limited by connection timeouts and interruptions at the proxy layer, and for scenarios where a reply only comes after three hours, the polling window setting itself is a challenge.
50%UnverifiedPolling is the receiver periodically querying the source system on its own; it is more reliable but has latency and additional overhead.
50%UnverifiedPolling at a fixed interval has two problems: when there are many tasks it causes a large number of invalid requests that consume quota and may even trigger rate limiting; when tasks take a long time it may lengthen the total waiting time
50%UnverifiedAfter NVMe SSDs became fast enough to respond at the microsecond level, the storage industry adopted polling instead of interrupts, having the CPU actively and frequently check the completion queue, sacrificing idle-time energy efficiency for determinism and throughput at low latency.
50%UnverifiedPolling is when a program repeatedly queries an external data source or API at fixed intervals to determine whether the state has changed; its advantage is simplicity and not depending on the other party supporting callbacks, and its cost is generating invalid requests and introducing latency.
50%UnverifiedWhen the data source supports Webhook, Webhook should be used preferentially, and only when it does not support it should one fall back to the polling approach.
50%UnverifiedThe current alternative for AI agents to obtain external events is constant polling, which wastes API call quotas and slows response speed.
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