comparison mapcrafter with overviewer

overviewerはCPUを自動検出するので同時実行プロセス数の指定は無しで。同じワールドのデータなのにレンダリングするタイル数がなぜか違う。双方ともsmooth_lighting。
overviewerは約90分、mapcrafterは約30分と、mapcrafterが約3倍高速。仮にレンダリングタイル数を揃えると約2.2倍高速ということになる。

$ overviewer.py --config=minecraft/overviewer.config
2015-08-18 18:51:28  Welcome to Minecraft Overviewer!
2015-08-18 18:51:28  Generating textures...
2015-08-18 18:52:17  Preprocessing...
2015-08-18 18:54:02  Rendering 40848 total tiles.
 99% [================================================================================================= ] 40833 7.78t/s eta 00h 00m 01s
2015-08-18 20:21:28  Rendering complete!
2015-08-18 20:21:29  Your render has been written to '/var/www/html/map_test', open index.html to view it
$ mapcrafter -j 4 -c mapcrafter.render_test.conf 
2015-08-18 18:13:27 [INFO] [default] Scanning worlds...
2015-08-18 18:13:29 [INFO] [default] [1/1] Rendering map map_myworld_n ("Day"):
2015-08-18 18:13:29 [INFO] [default] [1.1/1.1] Rendering rotation top-left:
2015-08-18 18:13:29 [INFO] [default] Scanning required tiles...
2015-08-18 18:13:30 [INFO] [default] 4 threads will render 30348 render tiles.
[============================================================================================] 100.00% 30348/30348 17.72/s             
2015-08-18 18:42:03 [INFO] [default] [1.1/1.1] Rendering rotation top-left took 1713 seconds.
2015-08-18 18:42:03 [INFO] [default] Rendering all worlds took 1714 seconds.
2015-08-18 18:42:03 [INFO] [default] Finished.....aaand it's gone!