note BrowserUk <blockquote><i> This is premature optimisation gone mad! For most purposes for speed to be a factor in this decision the array would need to contain of the order of 1 million entries. </i></blockquote> <p>Actually, significant differences start at around 200,000; and as someone who regularly does similar processing with 10s and even 100s of millions, knowing what works quickest whilst avoiding unnecessary memory growth is important. <p>And unless you have some psychic insight to the OPs application, you have nothing on which to base your conclusions, so it is they that are "premature". <div class="pmsig"><div class="pmsig-171588"> <hr /> <font size=1 > <div>With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'</div> <div>Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.</div> <div>"Science is about questioning the status quo. Questioning authority". </div> <div>In the absence of evidence, opinion is indistinguishable from prejudice. <p align=right> [http://thebottomline.cpaaustralia.com.au/|RIP Neil Armstrong]</p></div> </font> </div></div> 1008288 1008390