<h1 id="coroutine-gotchas">CoRoutine Gotchas<a aria-hidden="true" class="anchor-heading icon-link" href="#coroutine-gotchas"></a></h1>
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<div class="portal-title">From <span class="portal-text-title">Cancellation Gotchas (With Regular Job)</span></div>
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<li><strong>⚠️ Firstly, make sure to understand intended <a href="/notes/s54kdqmox04hl1foj16dhud">Exception/Cancellation Behavior with Regular Job</a> ⚠️</strong>.</li>
<li><a href="/notes/7vedlavi7nxvpwyvshljbvm">⚠️ Swallowing cancellation exception prevents cancellation ⚠️</a></li>
<li><a href="/notes/c2lwl9f5lr0fyfui0t5ic13">⚠️ Unhandled exception from async can go to parent scope without going through await() ⚠️</a></li>
<li><a href="/notes/b3m0ej26f1xgzapdwiimc7n">⚠️ cancel() call stops on next suspension point, NOT right away ⚠️</a></li>
<li><a href="/notes/q0bv51ypf7xhda3lf51rjb0">⚠️ join() does NOT rethrow ⚠️</a></li>
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<div class="portal-title">From <span class="portal-text-title">scope functions gotchas</span></div>
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<li><a href="/notes/i7hh1e1v24bg3m9hg83ewt7">⚠️🐢 Mixing essential and non-essential operations in one coroutineScope 🐢⚠️</a></li>
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<div class="portal-title">From <span class="portal-text-title">building-scope-gotchas</span></div>
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<li><a href="/notes/678f18et3ek7l31u2g5kxte">+Job()/+SupervisorJob() must-inherit-from-parent or it will ⚠️not respect parent cancellation⚠️</a></li>
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<div class="portal-title">From <span class="portal-text-title">withTimeout gotchas</span></div>
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<li><a href="/notes/q1zf9cxqyrzrhymohekhxkn">⚠️ does-not-cancel-parent-or-siblings-on-timeout ⚠️</a></li>
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<li><a href="/notes/c9258om9ugbk7tqgxenb6bv">⚠️CoroutineExceptionHandler: does-not-work-with-async⚠️</a>
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<p>Job is not inherited: it is used as a parent</p>
<p>DONT: <code>runBlocking(SupervisorJob())</code> makes no sense.
pg 433.</p>
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<p><img src="/./assets/images/Screenshot-2025_08_13T22_12_54.png" alt="img" style="max-width:500px;display:block;margin:0 auto;border:5px solid black;"></p>
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<strong>Children</strong>
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<li><a href="/notes/wz9i8gnhdvxl4x6rneppam0">Benchmarking against Thread Pool</a></li>
<li><a href="/notes/azk8a048rgak2giz9tc8nwr">Benchmarking in Native</a></li>
<li><a href="/notes/6wwfoc349e4qegm8dvbizq9">Co routines invocations will wait for the background thread to finish even if result is not used right away.</a></li>
<li><a href="/notes/p8nycs37b0p8mole7a9fkl6">Delay Can Take Longer than requested</a></li>
<li><a href="/notes/tujmsm8mfq9x35yldmshoxl">Even with Async Await Io Dispatcher Not Using up All Cores</a></li>
<li><a href="/notes/e31x1mvbpd8u5vzghnhrnnv">Initial Run Blocking Takes Upwards of 100ms</a></li>
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<strong>Backlinks</strong>
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<li><a href="/notes/r0qynrhpu3ph69zmnpfur28">Kotlin Co-Routine</a></li>
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CoRoutine Gotchas

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## About 
Hello! Welcome to my public [vault/website](https://wiki.dendron.so/notes/6682fca0-65ed-402c-8634-94cd51463cc4/).

I use this place to clarify my thoughts, and share my notes on various topics. The areas of interest to me include: 
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### Highlighted notes

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