diff --git a/PBGitHistoryGrapher.m b/PBGitHistoryGrapher.m
index 65d2311..ab9760d 100644
--- a/PBGitHistoryGrapher.m
+++ b/PBGitHistoryGrapher.m
@@ -38,7 +38,9 @@
 	if (!revList || [revList count] == 0)
 		return;
 
+	//NSDate *start = [NSDate date];
 	NSThread *currentThread = [NSThread currentThread];
+	NSDate *lastUpdate = [NSDate date];
 	NSMutableArray *commits = [NSMutableArray array];
 	NSInteger counter = 0;
 
@@ -54,11 +56,16 @@
 				[searchSHAs addObjectsFromArray:[commit parents]];
 			}
 		}
-		if (++counter % 2000 == 0) {
-			[self sendCommits:commits];
-			commits = [NSMutableArray array];
+		if (++counter % 100 == 0) {
+			if ([[NSDate date] timeIntervalSinceDate:lastUpdate] > 0.1) {
+				[self sendCommits:commits];
+				commits = [NSMutableArray array];
+				lastUpdate = [NSDate date];
+			}
 		}
 	}
+	//NSTimeInterval duration = [[NSDate date] timeIntervalSinceDate:start];
+	//NSLog(@"Graphed %i commits in %f seconds (%f/sec)", counter, duration, counter/duration);
 
 	[self sendCommits:commits];
 	[delegate performSelectorOnMainThread:@selector(finishedGraphing) withObject:nil waitUntilDone:NO];
diff --git a/PBGitRevList.mm b/PBGitRevList.mm
index 00a1920..b3e4ef7 100644
--- a/PBGitRevList.mm
+++ b/PBGitRevList.mm
@@ -96,6 +96,7 @@ using namespace std;
 - (void) walkRevisionListWithSpecifier:(PBGitRevSpecifier*)rev
 {
 	NSDate *start = [NSDate date];
+	NSDate *lastUpdate = [NSDate date];
 	NSMutableArray *revisions = [NSMutableArray array];
 	PBGitGrapher *g = [[PBGitGrapher alloc] initWithRepository:repository];
 	std::map<string, NSStringEncoding> encodingMap;
@@ -125,6 +126,9 @@ using namespace std;
 
 	int num = 0;
 	while (true) {
+		if ([currentThread isCancelled])
+			break;
+
 		string sha;
 		if (!getline(stream, sha, '\1'))
 			break;
@@ -200,18 +204,19 @@ using namespace std;
 		if (isGraphing)
 			[g decorateCommit:newCommit];
 
-		if (++num % 1000 == 0) {
-			if ([currentThread isCancelled])
-				break;
-			NSDictionary *update = [NSDictionary dictionaryWithObjectsAndKeys:currentThread, kRevListThreadKey, revisions, kRevListRevisionsKey, nil];
-			[self performSelectorOnMainThread:@selector(updateCommits:) withObject:update waitUntilDone:NO];
-			revisions = [NSMutableArray array];
+		if (++num % 100 == 0) {
+			if ([[NSDate date] timeIntervalSinceDate:lastUpdate] > 0.1) {
+				NSDictionary *update = [NSDictionary dictionaryWithObjectsAndKeys:currentThread, kRevListThreadKey, revisions, kRevListRevisionsKey, nil];
+				[self performSelectorOnMainThread:@selector(updateCommits:) withObject:update waitUntilDone:NO];
+				revisions = [NSMutableArray array];
+				lastUpdate = [NSDate date];
+			}
 		}
 	}
 	
 	if (![currentThread isCancelled]) {
 		NSTimeInterval duration = [[NSDate date] timeIntervalSinceDate:start];
-		NSLog(@"Loaded %i commits in %f seconds", num, duration);
+		NSLog(@"Loaded %i commits in %f seconds (%f/sec)", num, duration, num/duration);
 
 		// Make sure the commits are stored before exiting.
 		NSDictionary *update = [NSDictionary dictionaryWithObjectsAndKeys:currentThread, kRevListThreadKey, revisions, kRevListRevisionsKey, nil];