On Wed, Jan 22, 2020 at 10:53 PM Han-Wen Nienhuys <hanw...@gmail.com> wrote:
> The GUILE 2.0 release > > https://lwn.net/Articles/428288/ > > has one big red flag for me. > > * Switch to the Boehm-Demers-Weiser garbage collector > We can easily measure this, by adding the following to #(display (version)) #(display " gc time taken: ") #(display (* 1.0 (/ (cdr (assoc 'gc-time-taken (gc-stats))) internal-time-units-per-second))) #(display "\n") on mozart-hrn-3, over 3 runs, we get 2.0.14 - avg 2.1s 1.8.8 - avg 0.31s so the new GC is about 5-10x slower than the old one. With GUILE 1.8, garbage collection covers typically is 10% of the runtime, so all things equal, the Boehm GC would cause a 1.5-2.0x slowdown in the total. It would be good to see how the JITting of code impacts Scheme execution. -- Han-Wen Nienhuys - hanw...@gmail.com - http://www.xs4all.nl/~hanwen
