tools: fastcheck adjust; 750ms works well for me.

Makefile

@@ -20,6 +20,45 @@ ALL_DEPENDS=$(patsubst %, ccan/%/.depends, $(ALL))
 # Not all modules have tests.
 ALL_TESTS=$(patsubst ccan/%/test/, %, $(foreach dir, $(ALL), $(wildcard ccan/$(dir)/test/)))
 
+# Here's my rough logarithmic timeout graph for my laptop:
+#
+# 302                                                  -     
+#    |                                                  / --*  
+#    |                                                 /       
+#    |                                                 /       
+#    |                                                /        
+#    |Execution Time, seconds                        /        
+#    |                                               /         
+#    |                                          ---//          
+#    |                                         /               
+#    |                                       //                
+#    |                    ---\            ---                  
+#    |                 ---    \\    ------                     
+#    |-----------------         \---                           
+# 19 +------------------------------------------------------+--
+#    0           Timeout (ms, logarithmic)               262144
+#
+# 140
+#    |                                                         
+#    |------------                                             
+#    |            ---                                          
+#    |               ---------                                 
+#    |                        -------                          
+#    |                               --\                       
+#    |                                  \\-                    
+#    | Tests skipped                       --\                 
+#    |                                        \                
+#    |                                         \\              
+#    |                                           \\\           
+#    |                                              \          
+#    |                                               \----     
+#  --+0---------------------------------------------------==+--
+#    0           Timeout (ms, logarithmic)               262144
+#
+# On my laptop, this runs 574 tests in 40 seconds, vs. a full check which
+# runs 676 tests in 260 seconds.
+FASTTIMEOUT=750
+
 default: libccan.a
 
 include Makefile-ccan
@@ -39,14 +78,14 @@ check-%: tools/ccanlint/ccanlint
 	@tools/ccanlint/ccanlint -d ccan/$*
 
 fastcheck-%: tools/ccanlint/ccanlint
-	@tools/ccanlint/ccanlint -t -d ccan/$*
+	@tools/ccanlint/ccanlint -t $(FASTTIMEOUT) -d ccan/$*
 
 # Doesn't test dependencies, doesn't print verbose fail results.
 summary-check-%: tools/ccanlint/ccanlint $(OBJFILES)
 	@tools/ccanlint/ccanlint -s -d ccan/$*
 
 summary-fastcheck-%: tools/ccanlint/ccanlint $(OBJFILES)
-	@tools/ccanlint/ccanlint -t -s -d ccan/$*
+	@tools/ccanlint/ccanlint -t $(FASTTIMEOUT) -s -d ccan/$*
 
 ccan/%/info: ccan/%/_info
 	$(CC) $(CFLAGS) -o $@ -x c $<

Makefile-ccan

@@ -2,8 +2,8 @@
 # For simple projects you could just do:
 #	SRCFILES += $(wildcard ccan/*/*.c)
 
-#CFLAGS=-g -O3 -Wall -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Werror -I. $(DEPGEN)
-CFLAGS=-g -Wall -Wstrict-prototypes -Wold-style-definition -Werror -I. $(DEPGEN)
+CFLAGS=-g -O3 -Wall -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Werror -I. $(DEPGEN)
+#CFLAGS=-g -Wall -Wstrict-prototypes -Wold-style-definition -Werror -I. $(DEPGEN)
 
 default: libccan.a
 

tools/ccanlint/ccanlint.c

@@ -37,18 +37,18 @@ static LIST_HEAD(normal_tests);
 static LIST_HEAD(finished_tests);
 bool safe_mode = false;
 static struct btree *exclude;
-static bool fastmode = false;
+static unsigned int timeout;
 
 static void usage(const char *name)
 {
-	fprintf(stderr, "Usage: %s [-s] [-n] [-v] [-t] [-d <dirname>]\n"
+	fprintf(stderr, "Usage: %s [-s] [-n] [-v] [-t <ms>] [-d <dirname>] [-x <tests>]\n"
 		"   -v: verbose mode\n"
 		"   -s: simply give one line summary\n"
 		"   -d: use this directory instead of the current one\n"
 		"   -n: do not compile anything\n"
 		"   -l: list tests ccanlint performs\n"
 		"   -x: exclude tests (e.g. -x trailing_whitespace,valgrind)\n"
-		"   -t: ignore (terminate) tests that are slow\n",
+		"   -t: ignore (terminate) tests that are slower than this\n",
 		name);
 	exit(1);
 }
@@ -130,9 +130,9 @@ static bool run_test(struct ccanlint *i,
 		return true;
 	}
 
-	timeleft = fastmode ? 1000 : default_timeout_ms;
+	timeleft = timeout ? timeout : default_timeout_ms;
 	result = i->check(m, &timeleft);
-	if (fastmode && timeleft == 0) {
+	if (timeout && timeleft == 0) {
 		skip = "timeout";
 		goto skip;
 	}
@@ -320,7 +320,7 @@ int main(int argc, char *argv[])
 
 	/* I'd love to use long options, but that's not standard. */
 	/* FIXME: getopt_long ccan package? */
-	while ((c = getopt(argc, argv, "sd:vnlx:t")) != -1) {
+	while ((c = getopt(argc, argv, "sd:vnlx:t:")) != -1) {
 		switch (c) {
 		case 'd':
 			dir = optarg;
@@ -346,7 +346,10 @@ int main(int argc, char *argv[])
 				btree_insert(exclude, exclude_strs[i]);
 		} break;
 		case 't':
-			fastmode = true;
+			timeout = atoi(optarg);
+			if (!timeout)
+				errx(1, "Invalid timeout %s: 1 ms minumum",
+				     optarg);
 			break;
 		default:
 			usage(argv[0]);