fmt benchmarks for binary, octal and hex

Author: pascaldekloe

library/coretests/benches/fmt.rs

@@ -162,3 +162,66 @@ fn write_u8_min(bh: &mut Bencher) {
         black_box(format!("{}", black_box(u8::MIN)));
     });
 }
+
+#[bench]
+fn write_12ints_bin(bh: &mut Bencher) {
+    bh.iter(|| {
+        black_box(format!("{:b}", black_box(0_u8)));
+        black_box(format!("{:b}", black_box(100_i8)));
+        black_box(format!("{:b}", black_box(-100_i8)));
+
+        black_box(format!("{:b}", black_box(0_u32)));
+        black_box(format!("{:b}", black_box(1000_i32)));
+        black_box(format!("{:b}", black_box(-1000_i32)));
+
+        black_box(format!("{:b}", black_box(0_u64)));
+        black_box(format!("{:b}", black_box(10000_i64)));
+        black_box(format!("{:b}", black_box(-10000_i64)));
+
+        black_box(format!("{:b}", black_box(0_u128)));
+        black_box(format!("{:b}", black_box(100000_i128)));
+        black_box(format!("{:b}", black_box(-100000_i128)));
+    });
+}
+
+#[bench]
+fn write_12ints_oct(bh: &mut Bencher) {
+    bh.iter(|| {
+        black_box(format!("{:o}", black_box(0_u8)));
+        black_box(format!("{:o}", black_box(100_i8)));
+        black_box(format!("{:o}", black_box(-100_i8)));
+
+        black_box(format!("{:o}", black_box(0_u32)));
+        black_box(format!("{:o}", black_box(1000_i32)));
+        black_box(format!("{:o}", black_box(-1000_i32)));
+
+        black_box(format!("{:o}", black_box(0_u64)));
+        black_box(format!("{:o}", black_box(10000_i64)));
+        black_box(format!("{:o}", black_box(-10000_i64)));
+
+        black_box(format!("{:o}", black_box(0_u128)));
+        black_box(format!("{:o}", black_box(100000_i128)));
+        black_box(format!("{:o}", black_box(-100000_i128)));
+    });
+}
+
+#[bench]
+fn write_12ints_hex(bh: &mut Bencher) {
+    bh.iter(|| {
+        black_box(format!("{:x}", black_box(0_u8)));
+        black_box(format!("{:x}", black_box(100_i8)));
+        black_box(format!("{:x}", black_box(-100_i8)));
+
+        black_box(format!("{:x}", black_box(0_u32)));
+        black_box(format!("{:x}", black_box(1000_i32)));
+        black_box(format!("{:x}", black_box(-1000_i32)));
+
+        black_box(format!("{:x}", black_box(0_u64)));
+        black_box(format!("{:x}", black_box(10000_i64)));
+        black_box(format!("{:x}", black_box(-10000_i64)));
+
+        black_box(format!("{:x}", black_box(0_u128)));
+        black_box(format!("{:x}", black_box(100000_i128)));
+        black_box(format!("{:x}", black_box(-100000_i128)));
+    });
+}