Add speed benchmark examples (#1068)

* add qwen2.5 perf report

* update readme

* rebuild docs and fix format issue

* remove fuzzy in speed_benchmark.po

* fix issue

* recover function_call.po

* update

* remove unused code in speed_benchmark.po

* add example

* add readme for speed benchmark scripts

* update readme

* update readme

* update

* refine code

* fix pr issue

* fix some issue for PR

* update installation

* add --generate_length param

* update

* update requirements

* Update README_zh.md

* Update README.md

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Co-authored-by: Ren Xuancheng <jklj077@users.noreply.github.com>