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A comment on How fast are Linux pipes anyway?. Parent comment

Re:How fast are Linux pipes anyway? by klohto on Thursday June 02, 2022 @09:27AM (#31594596)
Python pushes 15MiB on my M1 Pro if you go down a level and use sys directly.

   python3 -c 'import sys
   while (1): sys.stdout.write("1")'| pv>/dev/null
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Re:How fast are Linux pipes anyway? by mg on Thursday June 02, 2022 @09:44AM (#31594804)
That caches though. You can see it when you strace it.
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Re:How fast are Linux pipes anyway? by rovr138 on Thursday June 02, 2022 @10:01AM (#31594992) 

    python3 -u -c 'import sys
      while (1): sys.stdout.write("1")'| pv>/dev/null
427KiB/s

    python3 -c 'import sys
      while (1): sys.stdout.write("1")'| pv>/dev/null
6.08MiB/s

Using python 3.9.7 on macOS Monterey.

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Re:How fast are Linux pipes anyway? by klohto on Thursday June 02, 2022 @09:49AM (#31594875)
Good point, but so does a standard print call. Calling flush() after each write does bring the perf to 1.5MiB
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