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4166c0e4a0
Automatic merge from submit-queue avoid repeated length calculation and some other code improvements **What this PR does / why we need it**: 1. in function `ParsePairs`, calculating `invalidBuf`'s length over and over again brings performance penalty. a `invalidBufNonEmpty` bool value can fix this. 2. pairArg is not a string template and also there is no other arguments for `fmt.Sprintf`, so i remove `fmt.Sprintf` 3. in function `DumpReaderToFile`, we must check nil error first before defer statement, otherwise there maybe a potential nil error on `f.Close()` 4. add nil checks into `GetWideFlag` function 5. some other minor code improvements for better readability. Signed-off-by: bruceauyeung <ouyang.qinhua@zte.com.cn>