tree 08d2157a0e7ea87666feb61312501364edc85cf6
parent f3de7c238c93bde3228d59a428ba97edf0d81c57
author iamqizhao <toqizhao@gmail.com> 1443745479 -0700
committer iamqizhao <toqizhao@gmail.com> 1443745479 -0700

trace refactoring