process.nextTick替待setIimeout

process.nextTick替待setIimeout后，获得性能上的提升，以DSP的build为例，ALL
DONE时间从原来的54253ms提升到43011ms
Revert "process.nextTick替待setIimeout"

This reverts commit 31adf0ea55765c1992c434dddd1290df27f7e2ee.