postCollision performance on device

When a couple of physic objects is stacked up with postCollision listener, it slow down significantly on device because it raise a lot of events where its force is very very small that below 0.05

event.force =
0.035936947911978
1.3295379019951e-08
0.035936936736107
2.6168098798962e-08
0.035936936736107
2.6825436094668e-08
0.035936936736107
2.6860814017482e-08
0.035936936736107
2.6896275429067e-08
0.035936936736107
2.6932497121379e-08
0.035936936736107
2.6966667121542e-08
0.035936936736107
2.7000805147281e-08
0.035936936736107
2.7034687377636e-08
0.035936936736107
2.7068278285469e-08
0.035936936736107
2.5133592984616e-08
0.035936936736107
2.4943084042661e-08
0.035936914384365
4.9392703260764e-08
0.035936906933784
5.7750117576916e-08
0.035936906933784
6.3778493597511e-08
0.035936906933784
5.9662241369551e-08
0.035936906933784
6.0095516118963e-08
0.035936906933784
6.0115318945009e-08
0.035936906933784
6.0134929924516e-08
0.035936906933784
6.0155507242143e-08
0.035936906933784
6.0174450311479e-08
0.035936906933784
6.0193734441327e-08
0.035936906933784
6.0212975938612e-08
0.035936892032623
6.9115110079565e-08
0.035936892032623
6.6542213517096e-08
0.035936884582043
8.8287428923195e-08
0.035936884582043
8.8401222342327e-08
0.035936884582043
8.6852367076062e-08
0.035936877131462
8.8615308868611e-08
0.035936877131462
9.5208484651721e-08
[import]uid: 12088 topic_id: 8654 reply_id: 308654[/import]

Any ansca staff here?
[import]uid: 12088 topic_id: 8654 reply_id: 35840[/import]

why no one read this post ? [import]uid: 12088 topic_id: 8654 reply_id: 37124[/import]