I can speed it up by 10% just be replacing the "add 1 to" with "put true into". The first if would lose the ">0". A single pass went from 50s to 44s on my iMac.
On Sun, Aug 5, 2018 at 9:36 PM, Richard Gaskin via use-livecode < use-livecode@lists.runrev.com> wrote: > Mark Waddingham wrote: > > > Richard wrote: > >> > >> Thinking about performance, I wonder if there's anything from some of > >> the changes that have boosted PHP 7's performance so far above its > >> earlier versions which may be relevant for LC: > >> https://www.reddit.com/r/PHP/comments/3q2brz/how_is_php_7_tw > ice_as_fast/ > > > > I'd actually be really interested in a direct speed comparison between > > exactly equivalent operations in PHP7 and LC. > > Geoff Canyon and I corresponded on this back in March. I don't think > he'll mind me sharing some of the relevant parts of his test: > > ------------------- from GC ---------------------------------------- > > on mouseUp > put the long seconds into T > repeat with c = 1 to 10 > get get_primes(10000000) > end repeat > put "Found" && the number of lines in it && "primes in" && the long > seconds - T && "seconds" > end mouseUp > > function get_primes n > if n < 2 then return empty > if n = 2 then return 2 > put trunc(sqrt(n)) - 1 into mroot > repeat with i = 3 to mroot step 2 > if np[i] > 0 then next repeat > add 1 to p[i] > repeat with j = i^2 to n step i > add 1 to np[j] > end repeat > end repeat > put 2 & cr & the keys of p into R > sort lines of R numeric > repeat with i = mroot + (mroot + 1) mod 2 to n - 1 step 2 > if np[i] is empty then put cr & i after R > end repeat > return R > end get_primes > > And that takes about fifteen minutes to run on my 2013 MacBook Pro, where > the slowest performer he's working with takes less than 30 seconds, and PHP > 7 runs in under 7 seconds. Any ideas where I'm deviating in my > implementation compared to his? Here's the latest version of his test that > I found: > > https://blog.famzah.net/2016/09/10/cpp-vs-python-vs-php-vs-j > ava-vs-others-performance-benchmark-2016-q3/ > > ----------------------------------------------------------------- > > -- > Richard Gaskin > Fourth World Systems > Software Design and Development for the Desktop, Mobile, and the Web > ____________________________________________________________________ > ambassa...@fourthworld.com http://www.FourthWorld.com > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
