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You're overestimating the influence of buffer sizes above a certain threshold. Typically, increasing the buffer size beyond 4KB-ish doesn't help much, and may in fact be detrimental because it may push the buffer out of L1 cache. On my machine, testing with dd, using 1MB buffers is slower than 8KB. The 8KB default value for wc is actually chosen pretty well, it will be close to optimal for a large range of systems.

marcelm
– marcelm

2016-03-02 11:06:19 +00:00
Commented Mar 2, 2016 at 11:06

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