feat: add __performance

README.md

@@ -62,6 +62,8 @@ Project or files:
 │   ├── pcap
 │   ├── tcp
 │   └── udp_laminar
+├── __performance
+│   └── print_perf
 ├── __search
 │   ├── simsearch
 │   └── tantivy
@@ -125,7 +127,7 @@ Project or files:
     ├── vec.rs
     └── while.rs
 
-97 directories, 26 files
+99 directories, 26 files
 
 ```
 

__performance/print_perf/Cargo.lock

@@ -0,0 +1,14 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "print_perf"
+version = "0.1.0"
+dependencies = [
+ "print_perf 0.1.9",
+]
+
+[[package]]
+name = "print_perf"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04378d9c598036cd5c61d71245b4e5e3e6455d1f2ab2120a7b9055dace8d8a47"

__performance/print_perf/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "print_perf"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+print_perf = "0.1"

__performance/print_perf/src/main.rs

@@ -0,0 +1,34 @@
+use print_perf::*; 
+// or explicit print_perf::{perf, Perf};
+use std::time::Duration;
+use std::thread::sleep;
+
+fn add(a: i32, b: i32) -> i32 {
+    sleep(Duration::from_millis(100));
+    a + b
+}
+
+fn main() {
+    println!("main_1()");
+    main_1();
+    println!("main_2()");
+    main_2();
+}
+
+fn main_1() {
+    let add_p = perf!("add fn");
+    let result = add(4, 4);
+    add_p.end();
+    // ^-- prints: 0.100140446 (add fn) @ [src/main.rs:9]
+    assert_eq!(result, 8);
+}
+
+
+fn main_2() {
+    let p = perf!("add fn");
+    let _result = add(4, 4);
+    p.split("add");
+    let _div = _result / 2;
+    p.split("div");
+    p.end();
+}