* Optimize the Copy method of the Context struct: using 'make' to initialize the map('cp.Keys') with a length of 'c.Keys'; avoiding repeatedly assiging the 'params' to 'context'.
* Using temporary variables to save c.Keys and c.Params to prevent them from changing during the copying process.
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Co-authored-by: huangzw <huangzw@hsmap.com>
