Markus,
In these days, L2 cache (which usually goes to quite big like 0.5MB to
many MBs) usually runs at the same speed as CPU. (For some older CPUs,
at least it is 1/2 speed.)
With regards,
Ienup
] X-URL: http://www.cl.cam.ac.uk/~mgk25/
] Date: Fri, 26 Jan 2001 16:03:09 +0000
] From: Markus Kuhn <[EMAIL PROTECTED]>
] Subject: Re: kernel tty patches
] To: [EMAIL PROTECTED]
] MIME-version: 1.0
]
] Ienup Sung wrote on 2001-01-25 19:32 UTC:
] > I also saw your implementation came with xterm at XF86 4.0.2. I think it's
] > a good implementation but I dont't think it is achieving the best possible
] > performance since you are doing binary search and has many if expressions.
]
] Don't think, measure first (realistic conditions: determine the line
] widths of a screen full of lines after the wcwidth table has been
] removed from the L1 cache). Modern CPU's execute 10x faster than the
] main memory can provide new data. Access locality is a frequently
] underestimated performance factor.
]
] Markus
]
] --
] Markus G. Kuhn, Computer Laboratory, University of Cambridge, UK
] Email: mkuhn at acm.org, WWW: <http://www.cl.cam.ac.uk/~mgk25/>
]
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