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| -rw-r--r-- | README.md | 2 |
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@@ -749,6 +749,8 @@ callback, the main `callback` is immediately called with the value of the error. Once the `tasks` have completed, the results are passed to the final `callback` as an array. +**Note:** `parallel` is about kicking-off I/O tasks in parallel, not about parallel execution of code. If your tasks do not use any timers or perform any I/O, they will actually be executed in series. Any synchronous setup sections for each task will happen one after the other. JavaScript remains single-threaded. + It is also possible to use an object instead of an array. Each property will be run as a function and the results will be passed to the final `callback` as an object instead of an array. This can be a more readable way of handling results from |