Greetings! With the latest function src in core facility in 2.7.0, we are finally in the position to achieve a long held goal -- to define functions once and allow the compiler to collapse their definitions in the appropriate environment, as opposed to writing a separate compiler macro or c1 function to handle the compliation of each function. This clearly might only be of peripheral interest to users.
I've rewritten the seqlib locally with this facility in place, and it produces very fast code, but can get big. Like something under 40% bigger. I'd like some opinions on when inlining is worth it (automatically, that is, the user should always be able to declare the preference). Some thoughts: 1) when the code is under a certain size 2) when closure arguments are supplied (which can then be eliminated) 30 when the argument types are smaller than the declared argument types 4) when the function is 'common. GCL has always inlined member, mapcar, etc. without option or fuss, and no one has complained. What about remove, which has to handle arrays and lists, but need handle only one in certain environments? What about remove-duplicates, which is O(n^2)? Also, is it correct to test performance on really big lists and arrays, like of length 10000, even though the common case is much smaller? Advice appreciated as always. Take care, ============================================================================= ; 2.7.0 ; length 10000 (time (dotimes (i 100) (remove-duplicates r))) real time : 0.990 secs run-gbc time : 1.000 secs child run time : 0.000 secs gbc time : 0.000 secs NIL COMPILER>(defun g (x) (declare (list x))(remove-duplicates x)) G COMPILER>(compile 'g) #<compiled-function G> NIL NIL COMPILER>(time (dotimes (i 100) (g r))) real time : 0.470 secs run-gbc time : 0.470 secs child run time : 0.000 secs gbc time : 0.000 secs NIL COMPILER> ; 2.6.7 (time (dotimes (i 100) (remove-duplicates r))) real time : 11.870 secs run-gbc time : 11.860 secs child run time : 0.000 secs gbc time : 0.000 secs NIL ============================================================================= -- Camm Maguire [EMAIL PROTECTED] ========================================================================== "The earth is but one country, and mankind its citizens." -- Baha'u'llah _______________________________________________ Gcl-devel mailing list Gcl-devel@gnu.org http://lists.gnu.org/mailman/listinfo/gcl-devel
