{
  "id": 13901587,
  "title": "Debounce vs Throttle: I Counted Every Call",
  "url": "https://urgent.news/2026/10/12/debounce-vs-throttle-i-counted-every-call",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-10-12T07:38:55.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/raxxostudios/debounce-vs-throttle-i-counted-every-call-f16"
  },
  "original_language": "en",
  "account": "Debounce and throttle are techniques used to control the number of times a function is called based on a specific event. Debounce waits for a pause in events before executing the handler, while throttle ensures the handler runs at a steady pace, regardless of the event frequency.\n\nIn a test comparing 25 keystrokes and 60 scroll events, debounce resulted in 1 call while throttle produced 8 calls. The throttle function also had an additional detail: a trailing call that ensured the final event was not dropped.\n\nBoth debounce and throttle limit the number of times a handler runs, but they do so in different ways. Debounce waits for a pause, while throttle maintains a steady rhythm. The choice between them depends on the specific use case. For example, a search box should use debounce to avoid unnecessary requests, while a scroll-linked progress bar might benefit from throttle for a steady update.\n\nHowever, neither debounce nor throttle can guarantee the order of responses when dealing with asynchronous operations. In cases where the order matters, such as when updating a search result field, using an AbortController can help ensure the most recent response is used, while ignoring any abort errors that may occur.",
  "summary": "Debounce waits for a pause; 25 fast keystrokes collapsed into exactly 1 call at 300 ms Throttle keeps a steady beat; 60 scroll events at 60 Hz became 11 calls at 100 ms Debounce alone let a slow, stale search response overwrite the newer one in my test Pick by the question the UI asks: \"when they stop\" means debounce, \"while it happens\" means throttle Debounce and throttle both cut the number of…",
  "key_points": [
    "Debounce waits for event pause before calling function",
    "Throttle maintains steady pace regardless of event frequency",
    "Throttle includes trailing call to ensure final event not dropped"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}