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Friday, July 16, 2010
Efficient C++ Performance Programming Techniques
Publisher : Addison Wesley
Pub Date : November 03, 1999
ISBN: 0-201-37950-3
Pages : 336
Far too many programmers and software designers consider efficient C++ to be an
oxymoron. They regard C++ as inherently slow and inappropriate for performancecritical
applications. Consequently, C++ has had little success penetrating domains such
as networking, operating system kernels, device drivers, and others.
Efficient C++ explodes that myth. Written by two authors with first-hand experience
wringing the last ounce of performance from commercial C++ applications, this book
demonstrates the potential of C++ to produce highly efficient programs. The book reveals
practical, everyday object-oriented design principles and C++ coding techniques that can
yield large performance improvements. It points out common pitfalls in both design and
code that generate hidden operating costs.
This book focuses on combining C++'s power and flexibility with high performance and
scalability, resulting in the best of both worlds. Specific topics include temporary objects,
memory management, templates, inheritance, virtual functions, inlining, referencecounting,
STL, and much more.
With this book, you will have a valuable compendium of the best performance techniques
at your fingertips.
Table of Content
Table of Content .................................................................................................................. i
Copyright............................................................................................................................. v
Dedication ...................................................................................................................... vi
Preface............................................................................................................................... vi
Introduction...................................................................................................................... viii
Roots of Software Inefficiency................................................................................... viii
Our Goal ......................................................................................................................... xi
Software Efficiency: Does It Matter?.......................................................................... xi
Terminology .................................................................................................................. xii
Organization of This Book ......................................................................................... xiii
Chapter 1. The Tracing War Story................................................................................... 1
Our Initial Trace Implementation.................................................................................. 2
Key Points ....................................................................................................................... 7
Chapter 2. Constructors and Destructors....................................................................... 9
Inheritance...................................................................................................................... 9
Composition .................................................................................................................. 18
Lazy Construction ........................................................................................................ 19
Redundant Construction ............................................................................................. 21
Key Points ..................................................................................................................... 25
Chapter 3. Virtual Functions ........................................................................................... 26
Virtual Function Mechanics ........................................................................................ 26
Templates and Inheritance......................................................................................... 28
Key Points ..................................................................................................................... 31
Chapter 4. The Return Value Optimization .................................................................. 32
The Mechanics of Return-by-Value........................................................................... 32
The Return Value Optimization.................................................................................. 33
Computational Constructors....................................................................................... 35
Key Points ..................................................................................................................... 36
Chapter 5. Temporaries................................................................................................... 37
Object Definition........................................................................................................... 37
Type Mismatch ............................................................................................................. 38
Pass by Value............................................................................................................... 40
Return by Value............................................................................................................ 40
Eliminate Temporaries with op=()........................................................................... 42
Key Points ..................................................................................................................... 43
Chapter 6. Single-Threaded Memory Pooling.............................................................. 44
Version 0: The Global new() and delete()......................................................... 44
Version 1: Specialized Rational Memory Manager................................................. 45
Version 2: Fixed-Size Object Memory Pool ............................................................. 49
Version 3: Single-Threaded Variable-Size Memory Manager............................... 52
Key Points ..................................................................................................................... 58
Chapter 7. Multithreaded Memory Pooling................................................................... 59
Version 4: Implementation.......................................................................................... 59
Version 5: Faster Locking........................................................................................... 61
Key Points ..................................................................................................................... 64
Chapter 8. Inlining Basics ............................................................................................... 66
What Is Inlining?........................................................................................................... 66
Method Invocation Costs ............................................................................................ 69
Why Inline? ................................................................................................................... 72
Inlining Details .............................................................................................................. 73
Inlining Virtual Methods............................................................................................... 73
Performance Gains from Inlining ............................................................................... 74
Key Points ..................................................................................................................... 75
Chapter 9. Inlining—Performance Considerations...................................................... 76
Cross-Call Optimization .............................................................................................. 76
Why Not Inline? ............................................................................................................ 80
Development and Compile-Time Inlining Considerations...................................... 82
Profile-Based Inlining................................................................................................... 82
Inlining Rules ................................................................................................................ 85
Key Points ..................................................................................................................... 86
Chapter 10. Inlining Tricks .............................................................................................. 87
Conditional Inlining....................................................................................................... 87
Selective Inlining .......................................................................................................... 88
Recursive Inlining......................................................................................................... 89
Inlining with Static Local Variables ............................................................................ 92
Architectural Caveat: Multiple Register Sets ........................................................... 94
Key Points ..................................................................................................................... 94
Chapter 11. Standard Template Library ....................................................................... 96
Asymptotic Complexity................................................................................................ 96
Insertion........................................................................................................................ 96
Deletion....................................................................................................................... 103
Traversal...................................................................................................................... 105
Find.............................................................................................................................. 106
Function Objects ........................................................................................................ 108
Better than STL?........................................................................................................ 110
Key Points ................................................................................................................... 112
Chapter 12. Reference Counting ................................................................................. 113
Implementation Details.............................................................................................. 114
Preexisting Classes ................................................................................................... 123
Concurrent Reference Counting.............................................................................. 126
Key Points ................................................................................................................... 129
Chapter 13. Coding Optimizations............................................................................... 131
Caching........................................................................................................................ 132
Precompute................................................................................................................. 133
Reduce Flexibility ....................................................................................................... 134
80-20 Rule: Speed Up the Common Path.............................................................. 134
Lazy Evaluation .......................................................................................................... 137
Useless Computations .............................................................................................. 139
System Architecture................................................................................................... 140
Memory Management ............................................................................................... 140
Library and System Calls.......................................................................................... 142
Compiler Optimization............................................................................................... 143
Key Points ................................................................................................................... 144
Chapter 14. Design Optimizations............................................................................... 145
Design Flexibility ........................................................................................................ 145
Caching........................................................................................................................ 148
Efficient Data Structures ........................................................................................... 150
Lazy Evaluation .......................................................................................................... 151
Useless Computations .............................................................................................. 153
Obsolete Code............................................................................................................ 154
Key Points ................................................................................................................... 155
Chapter 15. Scalability................................................................................................... 156
The SMP Architecture ............................................................................................... 158
Amdahl's Law.............................................................................................................. 160
Multithreaded and Synchronization Terminology.................................................. 161
Break Up a Task into Multiple Subtasks................................................................. 162
Cache Shared Data ................................................................................................... 163
Share Nothing............................................................................................................. 164
Partial Sharing ............................................................................................................ 166
Lock Granularity ......................................................................................................... 167
False Sharing.............................................................................................................. 169
Thundering Herd ........................................................................................................ 170
Reader/Writer Locks.................................................................................................. 171
Key Points ................................................................................................................... 172
Chapter 16. System Architecture Dependencies ...................................................... 173
Memory Hierarchies................................................................................................... 173
Registers: Kings of Memory ..................................................................................... 174
Disk and Memory Structures.................................................................................... 177
Cache Effects ............................................................................................................. 179
Cache Thrash ............................................................................................................. 180
Avoid Branching ......................................................................................................... 181
Prefer Simple Calculations to Small Branches...................................................... 182
Threading Effects ....................................................................................................... 183
Context Switching ...................................................................................................... 184
Kernel Crossing.......................................................................................................... 186
Threading Choices..................................................................................................... 187
Key Points ................................................................................................................... 189
Bibliography.................................................................................................................... 190
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