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From: "Eli Zaretskii" <eliz AT gnu DOT org>
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In-reply-to: <g1bbt0990aj8g8eqdei7046v8fmpm4a0ts@4ax.com> (message from Brian
	Inglis on Fri, 31 Dec 2004 20:35:25 GMT)
Subject: Re: DREADED fseek
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> From: Brian Inglis <Brian DOT Inglis AT SystematicSW DOT Invalid>
> Date: Fri, 31 Dec 2004 20:35:25 GMT
> 
> Typical results (including open and close) are:
> 
>                          __ default __  __ setvbuf __
> File   	Size Buffer Reads Time Transfer  Time Transfer Faster
>        	(MB)   (B)	 (s)	(MB/s)  (s)    (MB/s)
> PD2.DLL	 17  64K    278  1.813  9.574	1.762  9.853  setvbuf
> PD2.DLL	 17  32K    556  1.835  9.457	1.792  9.684  setvbuf
> PD2.DLL	 17  16K   1111  1.802  9.632	1.791  9.692  setvbuf
> PD2.DLL	 17   8K   2222  1.836  9.452	1.747  9.935  setvbuf
> PD2.DLL	 17   4K   4444  1.809  9.597	1.811  9.585  default
> PD2.DLL	 17   2K   8887  1.810  9.587	1.814  9.570  default
> PD2.DLL	 17   1K  17774  1.753  9.904	1.802  9.630  default
> PD2.DLL	 17  512  35548  1.782  9.740	1.788  9.705  default
> PD2.DLL	 17  256  71095  1.795  9.667	1.813  9.573  default

That fits my recollections: changing the buffer (any buffer) size
doesn't affect the I/O speed too much.

Thanks for digging into this.