diff --git a/src/turbonss-makecorpus.zig b/src/turbonss-makecorpus.zig
index f6ae845..cda6ad8 100644
--- a/src/turbonss-makecorpus.zig
+++ b/src/turbonss-makecorpus.zig
@@ -22,8 +22,8 @@ const usage =
     \\  -h             Print this help message and exit
     \\  --directory    Write files to given directory (default: .)
     \\  --num-users    Number of users (default: 20000)
-    \\  --num-groups   Number of groups (default: 5000)
-    \\  --avg-members  Average members per group (default: 20)
+    \\  --num-groups   Number of groups (default: 10000)
+    \\  --avg-members  Average members per group (default: 1000)
     \\
 ;
 
@@ -71,7 +71,6 @@ fn execute(
     }
 
     if (myflags.args.len != 0) {
-        std.debug.print("args: {s}\n", .{myflags.args});
         stderr.writeAll(usage) catch {};
         return error.User;
     }
@@ -79,7 +78,6 @@ fn execute(
     const num_users = parseInt(stderr, myflags, "--num-users", 20000) orelse return error.User;
     const num_groups = parseInt(stderr, myflags, "--num-groups", 5000) orelse return error.User;
     const avg_members = parseInt(stderr, myflags, "--avg-members", 20) orelse return error.User;
-    std.debug.print("num_users={d}\n", .{num_users});
 
     // longest possible path name: 16k? dunno.
     var buf: [1 << 14]u8 = undefined;
@@ -115,7 +113,7 @@ fn execute(
     try dump_group(group_wr.writer(), num_users, num_groups, avg_members);
     group_wr.flush() catch return error.IO;
 
-    std.debug.print("\nwrote users={d} groups={d} avg-members={d} to {s}\n", .{
+    std.debug.print("wrote users={d} groups={d} avg-members={d} to {s}\n", .{
         num_users,
         num_groups,
         avg_members,