shorten test-io time
shorten test-io time


Former-commit-id: 8ff596bf7e56d88a4a89ed5e47f4c17153d45503
chunyang-wen/dynet,xunzhang/dynet,danielhers/dynet,chunyang-wen/dynet,clab/dynet,shuheik/dynet,clab/dynet,clab/cnn,shuheik/dynet,clab/dynet,clab/dynet,shuheik/dynet,clab/dynet,clab/cnn,danielhers/dynet,shuheik/dynet,danielhers/dynet,shuheik/dynet,danielhers/dynet,danielhers/dynet,clab/dynet,xunzhang/dynet,clab/dynet,xunzhang/dynet,chunyang-wen/dynet,danielhers/dynet,shuheik/dynet,danielhers/dynet,clab/cnn,xunzhang/dynet,chunyang-wen/dynet,shuheik/dynet