From 183c7141e2674b07441655a1f590688d8b1886a4 Mon Sep 17 00:00:00 2001
From: Mathias Labeyrie <mathias.labeyrie@gmail.com>
Date: Wed, 5 Nov 2014 14:44:51 +0100
Subject: [PATCH 1/7] performance test for glm::fastCos

---
 test/gtx/gtx_fast_trigonometry.cpp | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/test/gtx/gtx_fast_trigonometry.cpp b/test/gtx/gtx_fast_trigonometry.cpp
index c7ad3e6e..d3787708 100644
--- a/test/gtx/gtx_fast_trigonometry.cpp
+++ b/test/gtx/gtx_fast_trigonometry.cpp
@@ -9,10 +9,36 @@
 
 #include <glm/gtc/type_precision.hpp>
 #include <glm/gtx/fast_trigonometry.hpp>
+#include <ctime>
+#include <cstdio>
+
+namespace fastCos{
+	int perf()
+	{
+		const float begin = -glm::pi<float>();
+		const float end = glm::pi<float>();
+		float result = 0.f;
+		const std::clock_t timestamp1 = std::clock();
+		for(float i=begin; i<end; i = nextafterf(i, end))
+			result = glm::fastCos(i);
+		const std::clock_t timestamp2 = std::clock();
+		for(float i=begin; i<end; i = nextafterf(i, end))
+			result = glm::cos(i);
+		const std::clock_t timestamp3 = std::clock();
+		const std::clock_t time_fastCos = timestamp2 - timestamp1;
+		const std::clock_t time_cos = timestamp3 - timestamp2;
+		std::printf("fastCos Time %d clocks\n", static_cast<unsigned int>(time_fastCos));
+		std::printf("cos Time %d clocks\n", static_cast<unsigned int>(time_cos));
+		return time_fastCos < time_cos ? 0 : 1;
+	}
+}
+
 
 int main()
 {
 	int Error(0);
 
+	Error += ::fastCos::perf();
+
 	return Error;
 }

From 74cfc7451aefde437a663cf0f61e456fbaf53e9a Mon Sep 17 00:00:00 2001
From: Mathias Labeyrie <mathias.labeyrie@gmail.com>
Date: Wed, 5 Nov 2014 15:02:17 +0100
Subject: [PATCH 2/7] test perf fastSin

---
 test/gtx/gtx_fast_trigonometry.cpp | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/test/gtx/gtx_fast_trigonometry.cpp b/test/gtx/gtx_fast_trigonometry.cpp
index d3787708..a4f7f8e6 100644
--- a/test/gtx/gtx_fast_trigonometry.cpp
+++ b/test/gtx/gtx_fast_trigonometry.cpp
@@ -33,12 +33,33 @@ namespace fastCos{
 	}
 }
 
+namespace fastSin{
+	int perf()
+	{
+		const float begin = -glm::pi<float>();
+		const float end = glm::pi<float>();
+		float result = 0.f;
+		const std::clock_t timestamp1 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::fastSin(i);
+		const std::clock_t timestamp2 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::sin(i);
+		const std::clock_t timestamp3 = std::clock();
+		const std::clock_t time_fast = timestamp2 - timestamp1;
+		const std::clock_t time_default = timestamp3 - timestamp2;
+		std::printf("fastSin Time %d clocks\n", static_cast<unsigned int>(time_fast));
+		std::printf("sin Time %d clocks\n", static_cast<unsigned int>(time_default));
+		return time_fast < time_default ? 0 : 1;
+	}
+}
 
 int main()
 {
 	int Error(0);
 
 	Error += ::fastCos::perf();
+	Error += ::fastSin::perf();
 
 	return Error;
 }

From c4b5fa2a931aae05b3cea2c26a3e51f767ae73fb Mon Sep 17 00:00:00 2001
From: Mathias Labeyrie <mathias.labeyrie@gmail.com>
Date: Wed, 5 Nov 2014 15:02:26 +0100
Subject: [PATCH 3/7] test perf fastTan

---
 test/gtx/gtx_fast_trigonometry.cpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/test/gtx/gtx_fast_trigonometry.cpp b/test/gtx/gtx_fast_trigonometry.cpp
index a4f7f8e6..ff65878b 100644
--- a/test/gtx/gtx_fast_trigonometry.cpp
+++ b/test/gtx/gtx_fast_trigonometry.cpp
@@ -54,12 +54,35 @@ namespace fastSin{
 	}
 }
 
+namespace fastTan{
+	int perf()
+	{
+		const float begin = -glm::pi<float>();
+		const float end = glm::pi<float>();
+		float result = 0.f;
+		const std::clock_t timestamp1 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::fastTan(i);
+		const std::clock_t timestamp2 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::tan(i);
+		const std::clock_t timestamp3 = std::clock();
+		const std::clock_t time_fast = timestamp2 - timestamp1;
+		const std::clock_t time_default = timestamp3 - timestamp2;
+		std::printf("fastTan Time %d clocks\n", static_cast<unsigned int>(time_fast));
+		std::printf("tan Time %d clocks\n", static_cast<unsigned int>(time_default));
+		return time_fast < time_default ? 0 : 1;
+	}
+}
+
+
 int main()
 {
 	int Error(0);
 
 	Error += ::fastCos::perf();
 	Error += ::fastSin::perf();
+	Error += ::fastTan::perf();
 
 	return Error;
 }

From 43387c81de38e3cdcafa703b53191b9d1a8b77d5 Mon Sep 17 00:00:00 2001
From: Mathias Labeyrie <mathias.labeyrie@gmail.com>
Date: Wed, 5 Nov 2014 15:05:33 +0100
Subject: [PATCH 4/7] test perf fastAcos

---
 test/gtx/gtx_fast_trigonometry.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/test/gtx/gtx_fast_trigonometry.cpp b/test/gtx/gtx_fast_trigonometry.cpp
index ff65878b..0856dfc2 100644
--- a/test/gtx/gtx_fast_trigonometry.cpp
+++ b/test/gtx/gtx_fast_trigonometry.cpp
@@ -75,6 +75,27 @@ namespace fastTan{
 	}
 }
 
+namespace fastAcos{
+	int perf()
+	{
+		const float begin = -glm::pi<float>();
+		const float end = glm::pi<float>();
+		float result = 0.f;
+		const std::clock_t timestamp1 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::fastAcos(i);
+		const std::clock_t timestamp2 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::acos(i);
+		const std::clock_t timestamp3 = std::clock();
+		const std::clock_t time_fast = timestamp2 - timestamp1;
+		const std::clock_t time_default = timestamp3 - timestamp2;
+		std::printf("fastAcos Time %d clocks\n", static_cast<unsigned int>(time_fast));
+		std::printf("acos Time %d clocks\n", static_cast<unsigned int>(time_default));
+		return time_fast < time_default ? 0 : 1;
+	}
+}
+
 
 int main()
 {
@@ -83,6 +104,7 @@ int main()
 	Error += ::fastCos::perf();
 	Error += ::fastSin::perf();
 	Error += ::fastTan::perf();
+	Error += ::fastAcos::perf();
 
 	return Error;
 }

From a7b3fca0b2caa11cee796ab75e77e4e095bffc0d Mon Sep 17 00:00:00 2001
From: Mathias Labeyrie <mathias.labeyrie@gmail.com>
Date: Wed, 5 Nov 2014 15:06:07 +0100
Subject: [PATCH 5/7] test perf fastAsin

---
 test/gtx/gtx_fast_trigonometry.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/test/gtx/gtx_fast_trigonometry.cpp b/test/gtx/gtx_fast_trigonometry.cpp
index 0856dfc2..7b27cbf4 100644
--- a/test/gtx/gtx_fast_trigonometry.cpp
+++ b/test/gtx/gtx_fast_trigonometry.cpp
@@ -96,6 +96,27 @@ namespace fastAcos{
 	}
 }
 
+namespace fastAsin{
+	int perf()
+	{
+		const float begin = -glm::pi<float>();
+		const float end = glm::pi<float>();
+		float result = 0.f;
+		const std::clock_t timestamp1 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::fastAsin(i);
+		const std::clock_t timestamp2 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::asin(i);
+		const std::clock_t timestamp3 = std::clock();
+		const std::clock_t time_fast = timestamp2 - timestamp1;
+		const std::clock_t time_default = timestamp3 - timestamp2;
+		std::printf("fastAsin Time %d clocks\n", static_cast<unsigned int>(time_fast));
+		std::printf("asin Time %d clocks\n", static_cast<unsigned int>(time_default));
+		return time_fast < time_default ? 0 : 1;
+	}
+}
+
 
 int main()
 {
@@ -105,6 +126,7 @@ int main()
 	Error += ::fastSin::perf();
 	Error += ::fastTan::perf();
 	Error += ::fastAcos::perf();
+	Error += ::fastAsin::perf();
 
 	return Error;
 }

From ef1c33d2d5ed09bb3609a9abf20c0b7d1f375acc Mon Sep 17 00:00:00 2001
From: Mathias Labeyrie <mathias.labeyrie@gmail.com>
Date: Wed, 5 Nov 2014 15:20:53 +0100
Subject: [PATCH 6/7] test perf fastAtan

---
 test/gtx/gtx_fast_trigonometry.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/test/gtx/gtx_fast_trigonometry.cpp b/test/gtx/gtx_fast_trigonometry.cpp
index 7b27cbf4..051c5d2d 100644
--- a/test/gtx/gtx_fast_trigonometry.cpp
+++ b/test/gtx/gtx_fast_trigonometry.cpp
@@ -117,6 +117,27 @@ namespace fastAsin{
 	}
 }
 
+namespace fastAtan{
+	int perf()
+	{
+		const float begin = -glm::pi<float>();
+		const float end = glm::pi<float>();
+		float result = 0.f;
+		const std::clock_t timestamp1 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::fastAtan(i);
+		const std::clock_t timestamp2 = std::clock();
+		for (float i = begin; i<end; i = nextafterf(i, end))
+			result = glm::atan(i);
+		const std::clock_t timestamp3 = std::clock();
+		const std::clock_t time_fast = timestamp2 - timestamp1;
+		const std::clock_t time_default = timestamp3 - timestamp2;
+		std::printf("fastAtan Time %d clocks\n", static_cast<unsigned int>(time_fast));
+		std::printf("atan Time %d clocks\n", static_cast<unsigned int>(time_default));
+		return time_fast < time_default ? 0 : 1;
+	}
+}
+
 
 int main()
 {
@@ -127,6 +148,7 @@ int main()
 	Error += ::fastTan::perf();
 	Error += ::fastAcos::perf();
 	Error += ::fastAsin::perf();
+	Error += ::fastAtan::perf();
 
 	return Error;
 }

From b3bdf83bd823ec2bbc352fd0922a02cfa3db333b Mon Sep 17 00:00:00 2001
From: Mathias Labeyrie <mathias.labeyrie@gmail.com>
Date: Wed, 5 Nov 2014 15:24:47 +0100
Subject: [PATCH 7/7] rename some vars

---
 test/gtx/gtx_fast_trigonometry.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/test/gtx/gtx_fast_trigonometry.cpp b/test/gtx/gtx_fast_trigonometry.cpp
index 051c5d2d..7eaffe77 100644
--- a/test/gtx/gtx_fast_trigonometry.cpp
+++ b/test/gtx/gtx_fast_trigonometry.cpp
@@ -25,11 +25,11 @@ namespace fastCos{
 		for(float i=begin; i<end; i = nextafterf(i, end))
 			result = glm::cos(i);
 		const std::clock_t timestamp3 = std::clock();
-		const std::clock_t time_fastCos = timestamp2 - timestamp1;
-		const std::clock_t time_cos = timestamp3 - timestamp2;
-		std::printf("fastCos Time %d clocks\n", static_cast<unsigned int>(time_fastCos));
-		std::printf("cos Time %d clocks\n", static_cast<unsigned int>(time_cos));
-		return time_fastCos < time_cos ? 0 : 1;
+		const std::clock_t time_fast = timestamp2 - timestamp1;
+		const std::clock_t time_default = timestamp3 - timestamp2;
+		std::printf("fastCos Time %d clocks\n", static_cast<unsigned int>(time_fast));
+		std::printf("cos Time %d clocks\n", static_cast<unsigned int>(time_default));
+		return time_fast < time_default ? 0 : 1;
 	}
 }