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Diffstat (limited to 'docs/src')
| -rw-r--r-- | docs/src/threadpool.rst | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/docs/src/threadpool.rst b/docs/src/threadpool.rst index 66ff53e2..89f00844 100644 --- a/docs/src/threadpool.rst +++ b/docs/src/threadpool.rst @@ -12,7 +12,11 @@ Its default size is 4, but it can be changed at startup time by setting the ``UV_THREADPOOL_SIZE`` environment variable to any value (the absolute maximum is 128). -The threadpool is global and shared across all event loops. +The threadpool is global and shared across all event loops. When a particular +function makes use of the threadpool (i.e. when using :c:func:`uv_queue_work`) +libuv preallocates and initializes the maximum number of threads allowed by +``UV_THREADPOOL_SIZE``. This causes a relatively minor memory overhead +(~1MB for 128 threads) but increases the performance of threading at runtime. Data types |