Implement multithreading

Cargo.lock

@@ -2,12 +2,69 @@
 # It is not intended for manual editing.
 version = 3
 
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+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
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+ "cfg-if",
+ "crossbeam-utils",
+ "memoffset",
+ "once_cell",
+ "scopeguard",
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@@ -19,12 +76,46 @@ dependencies = [
  "wasi",
 ]
 
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+dependencies = [
+ "libc",
+]
+
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@@ -61,13 +152,44 @@ dependencies = [
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+ "crossbeam-utils",
+ "num_cpus",
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 dependencies = [
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+ "rayon",
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