From: @liangzhibo
Reviewed-by: 
Signed-off-by:

From: @lichen666
Reviewed-by: @kisnwang,@zhunaipan
Signed-off-by: @zhunaipan

From: @xsmq
Reviewed-by: @zhoufeng54,@zhunaipan
Signed-off-by: @zhunaipan

From: @lianliguang
Reviewed-by: @zh_qh,@ginfung
Signed-off-by: @zh_qh

From: @xiefangqi
Reviewed-by: 
Signed-off-by:

From: @luoyang42
Reviewed-by: 
Signed-off-by:

From: @zhangbuxue
Reviewed-by: @ginfung
Signed-off-by:

From: @zhangbuxue
Reviewed-by: 
Signed-off-by:

From: @ziruiwu
Reviewed-by: 
Signed-off-by:

From: @alexyuyue
Reviewed-by: @robingrosman,@nsyca
Signed-off-by: @robingrosman

From: @robingrosman
Reviewed-by: 
Signed-off-by:

Signed-off-by: alex-yuyue <yue.yu1@huawei.com>

From: @yepei6
Reviewed-by: 
Signed-off-by:

Adjust memory usage to not increase as parallelism increases.  it will
stay at same level it would be with 4 parallelism

From: @liu_xiao_93
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

From: @ezphlow
Reviewed-by: 
Signed-off-by:

what if we just do nothing

trying wrapper approach

Fix yolo

From: @lijiaqi0612
Reviewed-by: 
Signed-off-by:

Change the summary test case to stage3 to avoid multiple processes that cause the summary test case to fail

From: @luoyang42
Reviewed-by: 
Signed-off-by:

From: @liujunzhu
Reviewed-by: @zhoufeng54,@guoqi1024
Signed-off-by: @guoqi1024

From: @zh_qh
Reviewed-by: @hwhewei,@zhunaipan
Signed-off-by: @zhunaipan

From: @alexyuyue
Reviewed-by: @robingrosman,@nsyca
Signed-off-by: @robingrosman

From: @liangzhibo
Reviewed-by: 
Signed-off-by:

---
Remove the routine of handling isolated nodes in Renormalize.
Add isolated nodes from Parser&Resolver.
Modify isolated nodes handling in FG&Manager.
Optimize the renormalize routines.
Other optimizations.

From: @jojobugfree
Reviewed-by: 
Signed-off-by:

Signed-off-by: alex-yuyue <yue.yu1@huawei.com>

From: @hfarahat
Reviewed-by: 
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From: @ezphlow
Reviewed-by: 
Signed-off-by:

From: @alexyuyue
Reviewed-by: @nsyca
Signed-off-by: