feat: improved num cpus in compilation

Cargo.toml

@@ -23,7 +23,6 @@ wasm-bindgen = { version = "0.2", optional = true }
 
 [build-dependencies]
 chrono = "0.4"
-num_cpus = "1"
 regex = "1"
 
 [profile.release]

build.rs

@@ -29,7 +29,7 @@ use std::fs::{File, OpenOptions};
 use std::io::Write;
 use std::path::Path;
 use std::process::Command;
-use std::{env, str};
+use std::{env, str, thread};
 
 const BUILD_OUT_FILE: &str = "build.rs";
 const SOURCE_DIR: &str = "./src/gen";
@@ -147,8 +147,11 @@ fn main() {
         &(std::mem::size_of::<usize>() * 8).to_string(),
     );
 
-    write_constant(&mut file, "DEFAULT_THREAD_POOL_SIZE", num_cpus::get());
-    write_constant(&mut file, "MAX_THREAD_POOL_SIZE", num_cpus::get() * 10);
+    write_constant(
+        &mut file,
+        "NUM_CPUS",
+        thread::available_parallelism().unwrap().get(),
+    );
 }
 
 fn write_constant<T>(file: &mut File, key: &str, val: T)

src/gen/mock.rs

@@ -13,5 +13,4 @@ pub const OPT_LEVEL: &str = "-";
 pub const MAKEFLAGS: &str = "-";
 pub const FEATURES: [&str; 1] = ["cpu"];
 pub const PLATFORM_CPU_BITS: &str = "64";
-pub const DEFAULT_THREAD_POOL_SIZE: usize = 1;
-pub const MAX_THREAD_POOL_SIZE: usize = 1;
+pub const NUM_CPUS: usize = 1;