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iTerm slow performance - possibly just with split panes and xterm256?

By geni... on January 25, 2011 19:41 (imported from Google Code)

What steps will reproduce the problem?

  1. Open a window and split pane 3 times so that you have four equal quadrants
  2. Use xterm256 (not sure if this is required)
  3. Use iTerm for a little while

What is the expected output? What do you see instead?
I'd expect it to perform normally, somewhat like Terminal.app

What version of the product are you using? On what operating system?
Alpha 16 - OS X 10.6.6

Please provide any additional information below.

I've attached some samples from Shark and from Sampler. Hopefully they're helpful!

top(1)
Processes: 82 total, 2 running, 80 sleeping, 323 threads 11:39:25
Load Avg: 0.37, 0.54, 0.94 CPU usage: 23.69% user, 12.79% sys, 63.50% idle
SharedLibs: 5940K resident, 6616K data, 0B linkedit.
MemRegions: 12821 total, 715M resident, 25M private, 290M shared.
PhysMem: 755M wired, 1237M active, 439M inactive, 2431M used, 1664M free.
VM: 183G vsize, 1040M framework vsize, 9912763(0) pageins, 1592(0) pageouts.
Networks: packets: 24449829/23G in, 24775890/19G out.
Disks: 735466/37G read, 10774021/274G written.

PID COMMAND %CPU TIME #TH #WQ #POR #MREG RPRVT RSHRD RSIZE
45673 iTerm 50.9 09:56:12 6 2 133 357 139M+ 37M 235M+
0- kernel_task 10.5 13:55:23 65/2 0 2 898 16M 0B 276M
1085 WindowServer 5.9 03:02:45 5 1 315 3780+ 227M 74M+ 286M+
47215 top 5.3 00:01.01 1/1 0 24 33 1008K 264K 1584K

[iTerm Profile.zip](https://storage.googleapis.com/google-code-attachments/iterm2/issue-539/comment-0/iTerm Profile.zip)