[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Do long element names impact performance?
On Thu, 2015-10-15 at 15:53 +0100, Michael Kay wrote: > > Comparing two strings for equality is linear time on the length of the > > strings. > > Not necessarily. If most of the comparisons return false, it may be a > lot better than linear. It’s likely in many cases that the comparison > will start by comparing the string lengths, so you might get the > fastest comparison on average by having the lengths highly variable. Linear time is the upper bound, which is generally how algorithms are described. Whether comparing string lengths is a good idea depends on your string implementation. I'm a C programmer. For me, a string is a NULL-terminated char array. It costs time to compute a length, so I wouldn't bother. > But who says it’s string comparison that dominates? It might be the > effect on network latency, or the cost of doing compression. You need > to make measurements to find out. I agree 100% with this statement. Using single character element names is an absurd premature optimization. Always measure first. -- Shaun
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