Re: [iPAQ] jffs2 slow on little writes ?

On Wed, 2003-01-15 at 11:13, wim delvaux wrote:
> Hi all,
>
> Say that you have something like ...
>
> SomeIO( char * File ) {
> int fd, i
> i = 0
> fd = open( File );
> while( i < 1000 ) {
> write( fd, &i, sizeof(i) );
> i ++;
> }
> }
>
> SomeIO( "FileOnFlash" ) // is SLOW, which is expected
> SomeIO("FIleOnRam") // is FAST, which is expected
>
> /* BUT WHY is this MUCH faster than the SomeIO("FileOnFlash")
> SomeIO("FileOnRam)
> system( "cp FileOnRam FileOnFlash)"
>
>
> Can anybody explain ?

Because you are writing in really small blocks. The cp-command is
writing in larger blocks..

I assume anyway...

/Erik

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Erik Bågfors               | erik_at_bagfors.nu
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