From 02aba668c408a473067bc26b8f36077384b9c14a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Hugo=20H=C3=B6rnquist?= Date: Tue, 8 Mar 2022 03:43:03 +0100 Subject: Add native UUID generator. While not necessary, since we barely use UUID:s, it's still WAY faster, and nice to not depend on the system providing `uuidgen'. For comparison, number of UUID:s generated by different settups in 1 second: 65.000 :: guile native 700 :: guile shell-out 3.500.000 :: c native 100.000 :: libuuid - guile bindings 650.000 :: libuuid Tests where run with either (call-with-time-limit 1 (lambda () (let loop () (uuid) (set! count (1+ count)) (loop))) (lambda _ (display count))) or volatile unsigned long long count = 0; sigaction(SIGALARM, ...); alarm(1); for (;;) { uuid(); count++; } (let ((count 0)) (call-with-time-limit 1 (lambda () (let loop () ((@ (hnh util) uuidgen)) (set! count (1+ count)) (loop))) (lambda _ (format #t "exec count = ~:d~%" count)))) --- module/hnh/util.scm | 6 ------ 1 file changed, 6 deletions(-) (limited to 'module/hnh/util.scm') diff --git a/module/hnh/util.scm b/module/hnh/util.scm index 8cbc8c8d..1b5ceeab 100644 --- a/module/hnh/util.scm +++ b/module/hnh/util.scm @@ -575,9 +575,3 @@ (lambda () (for-each (lambda (pair) (setenv (car pair) (caddr pair))) env-pairs))))])) - - -(define-public (uuidgen) - ((@ (rnrs io ports) call-with-port) - ((@ (ice-9 popen) open-input-pipe) "uuidgen") - (@ (ice-9 rdelim) read-line))) -- cgit v1.2.3