1 files changed, 94 insertions, 0 deletions
diff --git a/stringbench.c b/stringbench.c
new file mode 100644
index 0000000..392ef37
--- /dev/null
+++ b/stringbench.c
@@ -0,0 +1,94 @@
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/time.h>
+
+#define START gettimeofday(&tv1, 0);
+#define END(x) gettimeofday(&tv2, 0); t1 = ((double)tv1.tv_sec)+((double)tv1.tv_usec)/1000000.0; t2 = ((double)tv2.tv_sec)+((double)tv2.tv_usec)/1000000.0; printf("%s: %f seconds\n", x, t2-t1)
+
+int main(int argc, char **argv) {
+	struct timeval tv1, tv2;
+	double t1, t2;
+	char * const s = (char * const) malloc(16);
+	char * const l = (char * const) malloc(15001);
+	char * const tmp = (char * const) malloc(15001);
+
+	for(int i=0; i<15; i++)
+		s[i]='a';
+	s[15]=0;
+
+	START;
+	for(int i=0; i<10000000; i++) {
+		memset(l, 'a', 15000);
+	}
+	END("10000000 * memset 15000*'a'");
+
+	l[15000]=0;
+
+	START;
+	for(int i=0; i<500000000; i++)
+		if(strlen(s) != 15)
+			fprintf(stderr, "strlen broken\n");
+	END("500000000 * strlen(15*a)");
+
+	START;
+	for(int i=0; i<1000000; i++)
+		if(strlen(l) != 15000)
+			fprintf(stderr, "strlen broken\n");
+	END("1000000 * strlen(15000*a)");
+
+	START;
+	for(int i=0; i<10000000; i++)
+		if(memchr(l, 'b', 15000))
+			fprintf(stderr, "bogus memchr\n");
+	END("10000000 * memchr not finding anything in 15000 chars");
+
+	START;
+	for(int i=0; i<10000000; i++)
+		if(strchr(l, 'b'))
+			fprintf(stderr, "bogus strchr\n");
+	END("10000000 * strchr not finding anything in 15000 chars");
+
+	l[5000]='b';
+	START;
+	for(int i=0; i<10000000; i++) {
+		char *b=memchr(l, 'b', 15000);
+		if(!b || *b != 'b')
+			fprintf(stderr, "bogus memchr II\n");
+	}
+	END("10000000 * memchr finding match at 5000");
+
+	START;
+	for(int i=0; i<10000000; i++) {
+		char *b=strchr(l, 'b');
+		if(!b || *b != 'b')
+			fprintf(stderr, "bogus strchr II\n");
+	}
+	END("10000000 * strchr finding match at 5000");
+
+	START;
+	for(int i=0; i<10000000; i++) {
+		memcpy(tmp, l, 15000);
+	}
+	END("10000000 * memcpy of 15000 bytes");
+
+	START;
+	for(int i=0; i<900000000; i++) {
+		memcpy(tmp, s, 15);
+	}
+	END("900000000 * memcpy of 15 bytes");
+
+	START;
+	for(int i=0; i<1000000; i++) {
+		strcpy(tmp, l);
+	}
+	END("1000000 * strcpy of 15000 bytes");
+
+	START;
+	for(int i=0; i<100000000; i++) {
+		strcpy(tmp, s);
+	}
+	END("100000000 * strcpy of 15 bytes");
+
+	return 0;
+}