No strace on Android, unfortunately. From: Marc Burns [mailto:m4bu...@uwaterloo.ca] Sent: Monday, September 14, 2015 8:10 PM To: John Carmack Cc: Racket Users Subject: Re: [racket-users] Startup times
Here’s the result of `strace -c -f -- racket -l racket/base` for Racket 6.1.1.8 on my Linux workstation: % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 99.08 0.004000 571 7 nanosleep 0.92 0.000037 0 236 read 0.00 0.000000 0 103 23 open 0.00 0.000000 0 79 close … Does it look similar on the Note 4? On Sep 14, 2015, at 9:00 PM, Marc Burns <m4bu...@uwaterloo.ca<mailto:m4bu...@uwaterloo.ca>> wrote: Set the environment variable PLTSTDERR=debug to get more verbose output. Startup involves traversing all the bytecode files that comprise the base environment. How fast is filesystem access on the Note 4 compared to PC? You could use strace to find the latency on different system calls made during startup. On Sep 14, 2015, at 8:55 PM, John Carmack <jo...@oculus.com<mailto:jo...@oculus.com>> wrote: I am experimenting with running racket natively on Android to compare with my current embedded Chibi scheme implementation. It would be convenient to just leave racket as a separate process and communicate over sockets/pipes so it exactly mimics my remote development case. The startup time to run a trivial console program is very long. A one line program with #lang racket/base takes over seven seconds: root@trlte:/mnt/shell/emulated/0/Oculus/racket/bin # time ./racket cmdline2.rkt cmdline2.rkt < line 1 line 2 line 3 line 4 line 5 line 6 line 7 line 8 line 9 0m7.96s real 0m7.04s user 0m0.65s system My first test, which still had the default #lang racket, took almost a minute to start: root@trlte:/mnt/shell/emulated/0/Oculus/racket/bin # time ./racket cmdline.rkt cmdline.rkt < line 1 line 2 line 3 line 4 line 5 line 6 line 7 line 8 line 9 0m54.16s real 0m48.68s user 0m4.83s system On a PC, it only takes a fraction of a second. This was on a Note 4, which should not be 100x slower than a PC. Could it not be using the compiled library bytecode somehow? I didn’t see any command line options for verbose output on startup, is there any way to force some extra information? -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com<mailto:racket-users+unsubscr...@googlegroups.com>. For more options, visit https://groups.google.com/d/optout<https://urldefense.proofpoint.com/v1/url?u=https://groups.google.com/d/optout&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=Kjg6LltY9QjkipKooaVldA%3D%3D%0A&m=9t0L95%2F3lRhPTANqB552UQS%2F%2BzE07Cf79TI1XR2YjPs%3D%0A&s=501f0d92de153954c39b1f1e37b2591fc1ba37351c9af1cbdb30e4081c2ea384>. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com<mailto:racket-users+unsubscr...@googlegroups.com>. For more options, visit https://groups.google.com/d/optout<https://urldefense.proofpoint.com/v1/url?u=https://groups.google.com/d/optout&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=Kjg6LltY9QjkipKooaVldA%3D%3D%0A&m=9t0L95%2F3lRhPTANqB552UQS%2F%2BzE07Cf79TI1XR2YjPs%3D%0A&s=501f0d92de153954c39b1f1e37b2591fc1ba37351c9af1cbdb30e4081c2ea384>. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
