From db978eb1358e3d99a204bf8cdb4582148cf53c4e Mon Sep 17 00:00:00 2001
From: Trivernis <trivernis@gmail.com>
Date: Fri, 3 Apr 2020 17:05:50 +0200
Subject: [PATCH] Add bitshift benchmarking

---
 Cargo.lock      |  4 ++--
 Cargo.toml      |  2 +-
 src/main.rs     | 14 +++++++++++++-
 src/to_bench.rs | 30 ++++++++++++++++++++++++++++++
 4 files changed, 46 insertions(+), 4 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 70ac2e4..413464e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,9 +8,9 @@ checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
 [[package]]
 name = "benchlib-rs"
-version = "0.2.2"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8eec9a8d80e5bb03637e22ea0900b8ac12c3b9e21215dfda88347b03f056d5d7"
+checksum = "e2b157249b658c600bea79e0ab5366561edf01f6e0dd0ba0075f0ad3945c2420"
 dependencies = [
  "rayon",
  "termion",
diff --git a/Cargo.toml b/Cargo.toml
index 3d1efe7..fca0ffb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ opt-level = 1
 [dependencies]
 rayon = "1.3.0"
 crossbeam-channel = "0.4.2"
-benchlib-rs = "0.2.2"
+benchlib-rs = "0.3.1"
 crossbeam-utils = "0.7.2"
 num_cpus = "1.0"
 num-traits = "0.2.11"
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 346211f..4c46215 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,15 +2,27 @@
 
 mod to_bench;
 
+use crate::to_bench::{bitshift_byte, max_f32_multiplication, max_u64_multiplications};
 use benchlib::benching::Bencher;
 use rayon::prelude::*;
 
+pub fn noop() {}
+
 pub fn main() {
     let mut bencher = Bencher::new();
     bencher
         .set_iterations(10000)
         .print_settings()
-        .bench("Dry Run", || {})
+        .bench("Empty closure", || {})
+        .bench("Empty fn", noop)
+        .bench("Empty loop to 1000", || for _ in 0..1000 {})
+        .bench("u64::MAX x u64::MAX 1000 times", || {
+            max_u64_multiplications(1000)
+        })
+        .bench("f32::MAX x f32::MAX 1000 times", || {
+            max_f32_multiplication(1000)
+        })
+        .bench("Bitshift u16 1 byte 1000 times", || bitshift_byte(1000))
         .bench("Multiply to 100", || to_bench::multiply_to(100))
         .bench("Summation from 0u32 to 10000", || {
             to_bench::summation_to::<u32>(10000)
diff --git a/src/to_bench.rs b/src/to_bench.rs
index 8db1f31..f995c95 100644
--- a/src/to_bench.rs
+++ b/src/to_bench.rs
@@ -3,9 +3,11 @@ use crossbeam_utils::sync::WaitGroup;
 use num_cpus;
 use num_traits::{PrimInt, Unsigned};
 use rayon::prelude::*;
+use std::f32;
 use std::sync::mpsc::channel;
 use std::sync::{Arc, Mutex};
 use std::thread;
+use std::u64;
 
 pub fn start_stop_thread() {
     let handle = thread::spawn(|| {
@@ -123,3 +125,31 @@ pub fn start_and_wait_for_num_cpu_threads() {
     }
     wg.wait();
 }
+
+pub fn max_f32_multiplication(times: usize) -> f64 {
+    let mut result = 0f64;
+    for _ in 0..times {
+        result = f32::MAX as f64 * f32::MAX as f64;
+    }
+
+    result
+}
+
+pub fn max_u64_multiplications(times: usize) -> u128 {
+    let mut result = 0u128;
+    for _ in 0..times {
+        result = u64::MAX as u128 * u64::MAX as u128
+    }
+
+    result
+}
+
+pub fn bitshift_byte(times: usize) -> u16 {
+    let mut result = 0u16;
+    for _ in 0..(times / 2) {
+        result = result << 8;
+        result = result >> 8;
+    }
+
+    result
+}