Add readme

gzzhangkai2014 · gzzhangkai2014 · commit 3a8e1a9ff5df · 2022-04-03T20:10:11.000+08:00
diff --git a/README.md b/README.md
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+This is a benchmark for python immutable map libraries.

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	`1`	`+This is a benchmark for python immutable map libraries.`