Reserve vector capacity in advance + minor optimizations
Reserve vector capacity in advance + minor optimizations

Change-Id: I04eea6825c02ea0c076b525e58a1dc86dd290b64

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core