Add rust and Go benchmarks for encoding json.

Cargo.lock

@@ -1,6 +1,89 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "itoa"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rustperf"
 version = "0.1.0"
+dependencies = [
+ "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
+[[package]]
+name = "ryu"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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+name = "serde"
+version = "1.0.101"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
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+version = "1.0.41"
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+dependencies = [
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+ "ryu 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
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+"checksum proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
+"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
+"checksum ryu 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bfa8506c1de11c9c4e4c38863ccbe02a305c8188e85a05a784c9e11e1c3910c8"
+"checksum serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)" = "9796c9b7ba2ffe7a9ce53c2287dfc48080f4b2b362fcc245a259b3a7201119dd"
+"checksum serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)" = "4b133a43a1ecd55d4086bd5b4dc6c1751c68b1bfbeba7a5040442022c7e7c02e"
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Cargo.toml

@@ -7,6 +7,8 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
 
 [profile.release]
 debug = true

src/lib.rs

@@ -0,0 +1,3 @@
+#![feature(test)]
+mod vec3;
+extern crate test;

src/vec3.rs

@@ -0,0 +1,40 @@
+use serde::Serialize;
+
+#[derive(Default, Debug, Serialize, PartialEq, Copy, Clone)]
+pub struct Vec3 {
+    pub x: f32,
+    pub y: f32,
+    pub z: f32,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use test::Bencher;
+
+    #[test]
+    fn test_vec3_to_json() {
+        let vecs = vec![Vec3 {
+            x: 1.0,
+            y: 2.0,
+            z: 3.0,
+        }];
+        assert_eq!(
+            serde_json::to_string(&vecs).expect("failed to json encode"),
+            r#"[{"x":1.0,"y":2.0,"z":3.0}]"#
+        );
+    }
+
+    #[bench]
+    fn bench_vec3_to_json(b: &mut Bencher) {
+        let vecs: Vec<Vec3> = (0..1000)
+            .map(|i| Vec3 {
+                x: 255. * i as f32 / 1000.,
+                y: 255. * i as f32 / 1000.,
+                z: 255. * i as f32 / 1000.,
+            })
+            .collect();
+
+        b.iter(|| serde_json::to_string(&vecs));
+    }
+}

src/vec3_test.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"encoding/json"
+	"reflect"
+	"testing"
+)
+
+type Vec3 struct {
+	X float32 `json:"x"`
+	Y float32 `json:"y"`
+	Z float32 `json:"z"`
+}
+
+func TestVec3ToJSON(t *testing.T) {
+	vecs := []Vec3{{X: 1.0, Y: 2.0, Z: 3.0}}
+
+	got, err := json.Marshal(vecs)
+	if err != nil {
+		t.Fatalf("Failed to marshal: %v", err)
+	}
+	want := []byte(`[{"x":1,"y":2,"z":3}]`)
+	if !reflect.DeepEqual(want, got) {
+		t.Fatalf("got != want\nGot:  %s\nWant: %s", got, want)
+	}
+}
+
+func BenchmarkVec3ToJSON(b *testing.B) {
+	var vecs []Vec3
+
+	for i := 0; i < 1000; i++ {
+		vecs = append(vecs, Vec3{
+			X: 255. * float32(i) / 1000.,
+			Y: 255. * float32(i) / 1000.,
+			Z: 255. * float32(i) / 1000.,
+		})
+	}
+	for i := 0; i < b.N; i++ {
+		if _, err := json.Marshal(vecs); err != nil {
+			b.Fatalf("Failed to marshal: %v", err)
+		}
+	}
+}