This is (slightly) off-topic, but may be of interest: I've done some comparing of the overall performance obtained with gcc 3.2.0, compared to gcc 2.95.3 (linux/x86 platform). Has anybody done similar things, and/or does anybody have any comments on this? (Maybe be handled off-list AFAIAC.) 1) On simple benchmarks (dhrystone, "floating dhrystone", some of my own), 3.2 is faster than 2.95.3, but with -O2 only. With -O3, execution times on these can become 2x longer with 3.2 . This appears to be due to -finline-functions that is activated by -O3. 2) Comparison with my own graphing programme with its own expression language (with a byte compiler that that constructs call-graphs with functionpointers to the callbacks and other relevant info, probably not unlike the one in R). Here, 3.2 with -O3 is generally somewhat faster, but I found a single construct (calling a user-defined procedure using a user-supplied pointer to it) that takes almost 10x as long to evaluate with the 3.2 binary. Specifically, concerning point 2): if sum is a procedure that evaluates add[$[0],$[1]] ($ being an array with the procedure's arguments) and v1,v2 are constants, sum[v1,v2] is very slightly slower with 3.2 than with 2.95.3 . call[&sum,v1,v1] with 2.95.3 takes as much time as evaluating just v1,v2 (sic!!), whereas with 3.2 it takes more than 50% more time than sum[v1,v2] (and evaluating v1,v2 is faster). In both cases, the procedure code *is* evaluated, and my "compiler" doesn't do loop optimising :) I think that "flabbergasted" is a correct description of my state of mind in this... R.B. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._