🔬 Testing And Optimization

Technical resources on systematically evaluating and improving systems — from A/B testing to performance tuning — to achieve measurable, data-driven results.

Agile Testing

by Lisa Crispin • 2008

Shift quality left: a practical guide to weaving testing into every day of agile development.

3.82

1k+

🔄 Agile Development 🧪 Software Testing 🤖 Test Automation

Agile Testing 89%

Shift quality left: a practical guide to weaving testing into every day of agile development.

by Lisa Crispin 2008

3.82

1k+ ratings

🔄 Agile Development 🧪 Software Testing 🤖 Test Automation

Testing in Scrum

by Tilo Linz • 2014

Shift from a last-minute quality gate to testing woven into every sprint and commit.

3.72

🧪 Agile Testing 🔄 Scrum Methodology 🔴 Test Driven Development

Testing in Scrum 89%

Shift from a last-minute quality gate to testing woven into every sprint and commit.

by Tilo Linz 2014

3.72

25 ratings

🧪 Agile Testing 🔄 Scrum Methodology 🔴 Test Driven Development

The Art of Unit Testing

by Roy Osherove • 2009

C# unit testing without the brittle tests: stubs, mocks, and the isolation patterns that work.

4.09

1k+

🧪 Unit Testing 🖥️ .Net Development 🎭 Mocking Frameworks

The Art of Unit Testing 88%

C# unit testing without the brittle tests: stubs, mocks, and the isolation patterns that work.

by Roy Osherove 2009

4.09

1k+ ratings

🧪 Unit Testing 🖥️ .Net Development 🎭 Mocking Frameworks

Effective Unit Testing

by Lasse Koskela • 2012

A slow test suite kills productivity. The craft rules for fast, trustworthy unit tests.

3.80

118

🧪 Unit Testing ☕️ Java Development 🧩 Testable Design

Effective Unit Testing 88%

A slow test suite kills productivity. The craft rules for fast, trustworthy unit tests.

by Lasse Koskela 2012

3.80

118 ratings

🧪 Unit Testing ☕️ Java Development 🧩 Testable Design

Writing High-Performance .NET Code

by Ben Watson • 2014

Stop guessing why .NET drags. Measure, master the GC, and fix the real bottlenecks.

4.30

291

💻 .Net Development ⚡ Performance Tuning 💾 Memory Management

Writing High-Performance .NET Code Summary

Writing High-Performance .NET Code 88%

Stop guessing why .NET drags. Measure, master the GC, and fix the real bottlenecks.

by Ben Watson 2014

4.30

291 ratings

💻 .Net Development ⚡ Performance Tuning 💾 Memory Management

Software Engineering at Google

by Titus Winters • 2020

Google's testing playbook: 80/20, test behaviors not methods, write tests that never rot.

4.20

2k+

🧪 Software Testing 🏗️ Engineering Culture 🤖 Automated Testing

Software Engineering at Google 88%

Google's testing playbook: 80/20, test behaviors not methods, write tests that never rot.

by Titus Winters 2020

4.20

2k+ ratings

🧪 Software Testing 🏗️ Engineering Culture 🤖 Automated Testing

Building Secure and Reliable Systems

by Heather Adkins • 2020

Build systems that survive attacks and accidents. Google's framework for reliable, secure software.

3.89

199

🛡️ Software Security 🔧 Site Reliability 🔄 Devops Practices

Building Secure and Reliable Systems Summary

Building Secure and Reliable Systems 88%

Build systems that survive attacks and accidents. Google's framework for reliable, secure software.

by Heather Adkins 2020

3.89

199 ratings

🛡️ Software Security 🔧 Site Reliability 🔄 Devops Practices

Modern Software Engineering

by David Farley • 2021

Software is not a craft; it's a science. The discipline that turns teams into learning machines.

4.16

1k+

🔬 Scientific Engineering 🔄 Continuous Delivery 🔁 Feedback Loops

Modern Software Engineering 88%

Software is not a craft; it's a science. The discipline that turns teams into learning machines.

by David Farley 2021

4.16

1k+ ratings

🔬 Scientific Engineering 🔄 Continuous Delivery 🔁 Feedback Loops

Game Development Patterns and Best Practices

by John P. Doran • 2017

Design patterns that ship games: when to use each and how they prevent late-stage collapse.

3.90

🎮 Game Development 🧩 Design Patterns 🧹 Clean Code

Game Development Patterns and Best Practices Summary

Game Development Patterns and Best Practices 88%

Design patterns that ship games: when to use each and how they prevent late-stage collapse.

by John P. Doran 2017

3.90

20 ratings

🎮 Game Development 🧩 Design Patterns 🧹 Clean Code

Debugging

by David J. Agans • 2002

Learn to debug like a detective: reproduce the crime, divide the scene, and never guess.

4.26

509

🐛 Debugging 🎯 Root Cause Analysis ⚙️ Engineering Mindset

Debugging 88%

Learn to debug like a detective: reproduce the crime, divide the scene, and never guess.

by David J. Agans 2002

4.26

509 ratings

🐛 Debugging 🎯 Root Cause Analysis ⚙️ Engineering Mindset

Designing the User Experience of Game Development Tools

by David Lightbown • 2015

Game tools are an unmeasured productivity drain. A UX method for fixing what studios overlook.

4.13

🛠️ Game Development Tools 🖼️ User Interface Design 👥 User-Centered Design

Designing the User Experience of Game Development Tools Summary

Designing the User Experience of Game Development Tools 88%

Game tools are an unmeasured productivity drain. A UX method for fixing what studios overlook.

by David Lightbown 2015

4.13

16 ratings

🛠️ Game Development Tools 🖼️ User Interface Design 👥 User-Centered Design

High Performance Web Sites

by Steve Souders • 2007

The browser, not the backend, eats your load time. The engineering rules that win it back.

4.15

688

🚀 Web Performance ⚙️ Performance Engineering 📡 HTTP Optimization

High Performance Web Sites 88%

The browser, not the backend, eats your load time. The engineering rules that win it back.

by Steve Souders 2007

4.15

688 ratings

🚀 Web Performance ⚙️ Performance Engineering 📡 HTTP Optimization

Design Thinking Research

by Larry Leifer • 2013

What if your programming environment saved every change, so you could explore ideas without risk?

4.00

💻 Software Design 🗂️ Version Control 🔄 Iterative Development

Design Thinking Research 88%

What if your programming environment saved every change, so you could explore ideas without risk?

by Larry Leifer 2013

4.00

1 ratings

💻 Software Design 🗂️ Version Control 🔄 Iterative Development

Designing Games

by Tynan Sylvester • 2013

Build games as emotion machines: a systems guide to rules, choices, and difficulty.

4.47

517

🎮 Game Design 🧠 Player Psychology 🔄 Iterative Design

Designing Games 88%

Build games as emotion machines: a systems guide to rules, choices, and difficulty.

by Tynan Sylvester 2013

4.47

517 ratings

🎮 Game Design 🧠 Player Psychology 🔄 Iterative Design

Game Programming Patterns

by Robert Nystrom • 2011

The programming patterns that make game code resilient to change, and the ones that don't.

4.49

2k+

🎮 Game Programming 🧩 Design Patterns 🏗️ Software Architecture

Game Programming Patterns 88%

The programming patterns that make game code resilient to change, and the ones that don't.

by Robert Nystrom 2011

4.49

2k+ ratings

🎮 Game Programming 🧩 Design Patterns 🏗️ Software Architecture

Mastering Regular Expressions

by Jeffrey E.F. Friedl • 1997

Understand the engine behind your regex: why some patterns crawl, and how to make them run.

4.16

2k+

🧩 Regular Expressions 📝 Text Processing 🔍 Pattern Matching

Mastering Regular Expressions 88%

Understand the engine behind your regex: why some patterns crawl, and how to make them run.

by Jeffrey E.F. Friedl 1997

4.16

2k+ ratings

🧩 Regular Expressions 📝 Text Processing 🔍 Pattern Matching

Game Design Workshop

by Tracy Fullerton • 2008

The prototyping-first method that catches design disasters before you write a single line of code.

4.11

513

🎮 Game Design 📐 Rapid Prototyping 🔄 Iterative Design

Game Design Workshop 87%

The prototyping-first method that catches design disasters before you write a single line of code.

by Tracy Fullerton 2008

4.11

513 ratings

🎮 Game Design 📐 Rapid Prototyping 🔄 Iterative Design

Software Requirements

by Karl Wiegers • 1999

Nearly half of all software defects trace back to bad requirements. The fix starts here.

4.14

859

🏗️ Requirements Engineering 👤 User-Centered Design ✅ Software Quality

Software Requirements 87%

Nearly half of all software defects trace back to bad requirements. The fix starts here.

by Karl Wiegers 1999

4.14

859 ratings

🏗️ Requirements Engineering 👤 User-Centered Design ✅ Software Quality

The Clean Coder

by Robert C. Martin • 2011

A pro programmer's real job: saying no, keeping promises, staying calm when the build breaks.

4.26

9k+

💼 Developer Conduct 🔨 Software Craftsmanship 💎 Code Quality

The Clean Coder 87%

A pro programmer's real job: saying no, keeping promises, staying calm when the build breaks.

by Robert C. Martin 2011

4.26

9k+ ratings

💼 Developer Conduct 🔨 Software Craftsmanship 💎 Code Quality

Web Analytics 2.0

by Avinash Kaushik • 2009

Your web data is lying to you. The framework that turns page views into decisions.

4.13

2k+

🖥️ Digital Analytics 🎯 Performance Indicators 🧪 Online Experimentation

Web Analytics 2.0 87%

Your web data is lying to you. The framework that turns page views into decisions.

by Avinash Kaushik 2009

4.13

2k+ ratings

🖥️ Digital Analytics 🎯 Performance Indicators 🧪 Online Experimentation

Continuous delivery

by Jez Humble • 2010

Your releases are a nerve-wracking ordeal. The pipeline that turns them into a routine button-push.

4.20

3k+

🚚 Software Delivery 🔗 Continuous Integration ✅ Automated Testing

Continuous delivery 87%

Your releases are a nerve-wracking ordeal. The pipeline that turns them into a routine button-push.

by Jez Humble 2010

4.20

3k+ ratings

🚚 Software Delivery 🔗 Continuous Integration ✅ Automated Testing

Rocket Surgery Made Easy

by Steve Krug • 2009

Usability testing sounds expensive and complex. A three-person, one-morning method proves it isn't.

4.14

4k+

🧪 Usability Testing 🎨 User Experience Design 👀 User Observation

Rocket Surgery Made Easy 87%

Usability testing sounds expensive and complex. A three-person, one-morning method proves it isn't.

by Steve Krug 2009

4.14

4k+ ratings

🧪 Usability Testing 🎨 User Experience Design 👀 User Observation

Working Effectively with Legacy Code

by Michael C. Feathers • 2004

Every change is surgery in the dark. The proven, repeatable path to taming an untested codebase.

4.14

5k+

🧓 Legacy Code 🔧 Software Maintenance 🧪 Unit Testing

Working Effectively with Legacy Code Summary

Working Effectively with Legacy Code 87%

Every change is surgery in the dark. The proven, repeatable path to taming an untested codebase.

by Michael C. Feathers 2004

4.14

5k+ ratings

🧓 Legacy Code 🔧 Software Maintenance 🧪 Unit Testing

The Rebel's Guide to Email Marketing

by D.J. Waldow • 2012

Your email playbook is making you invisible. How to get opened, clicked, and read.

3.72

💻 Digital Marketing ✉️ Email Marketing 🚀 Growth Hacking

The Rebel's Guide to Email Marketing Summary

The Rebel's Guide to Email Marketing 87%

Your email playbook is making you invisible. How to get opened, clicked, and read.

by D.J. Waldow 2012

3.72

71 ratings

💻 Digital Marketing ✉️ Email Marketing 🚀 Growth Hacking

Play to Learn

by Sharon Boller • 2017

The step-by-step playbook for designing learning games that slash training time and boost retention.

3.95

🎮 Game Design 🛠️ Instructional Design 🎲 Game-Based Learning

Play to Learn 87%

The step-by-step playbook for designing learning games that slash training time and boost retention.

by Sharon Boller 2017

3.95

42 ratings

🎮 Game Design 🛠️ Instructional Design 🎲 Game-Based Learning

Understanding Software

by Max Kanat-Alexander • 2017

Code that's easy to write is hard to maintain. Here's how to flip that equation.

3.58

179

🛠️ Software Craftsmanship 🧹 Code Quality 🔍 Debugging Methods

Understanding Software 87%

Code that's easy to write is hard to maintain. Here's how to flip that equation.

by Max Kanat-Alexander 2017

3.58

179 ratings

🛠️ Software Craftsmanship 🧹 Code Quality 🔍 Debugging Methods

Paper Prototyping

by Carolyn Snyder • 2003

Paper screens, a colleague at the controls: find the fatal flaws while fixing them is free.

3.78

207

🎨 User Experience Design 🧪 Usability Testing ✂️ Rapid Prototyping

Paper Prototyping 87%

Paper screens, a colleague at the controls: find the fatal flaws while fixing them is free.

by Carolyn Snyder 2003

3.78

207 ratings

🎨 User Experience Design 🧪 Usability Testing ✂️ Rapid Prototyping

The Art of Debugging with GDB, DDD and Eclipse

by Norman Matloff • 2007

Your program crashes because it hides a secret. GDB, DDD, and Eclipse reveal it.

3.91

106

🐞 Debugging Techniques ⚡ Systems Programming 🧠 Memory Management

The Art of Debugging with GDB, DDD and Eclipse Summary

The Art of Debugging with GDB, DDD and Eclipse 87%

Your program crashes because it hides a secret. GDB, DDD, and Eclipse reveal it.

by Norman Matloff 2007

3.91

106 ratings

🐞 Debugging Techniques ⚡ Systems Programming 🧠 Memory Management

Landing Page Optimization

by Tim Ash • 2008

Small tests, big returns: how to optimize every landing page element for maximum conversion.

3.82

549

🎯 Conversion Rate Optimization 🧪 A/B Testing 🖌️ User Experience Design

Landing Page Optimization 87%

Small tests, big returns: how to optimize every landing page element for maximum conversion.

by Tim Ash 2008

3.82

549 ratings

🎯 Conversion Rate Optimization 🧪 A/B Testing 🖌️ User Experience Design

Gamification by Design

by Gabe Zichermann • 2011

Why most badges fail: the motivation design that turns app users into players.

3.65

490

🎮 Gamification ⚙️ Game Mechanics 🧠 Player Motivation

Gamification by Design 87%

Why most badges fail: the motivation design that turns app users into players.

by Gabe Zichermann 2011

3.65

490 ratings

🎮 Gamification ⚙️ Game Mechanics 🧠 Player Motivation

Lean Software Development

by Mary Poppendieck • 2003

The lean manufacturing toolkit, adapted for software teams: cut waste, ship faster, decide later.

4.19

1k+

🏭 Lean Methodology 🔄 Agile Methods 🚀 Continuous Delivery

Lean Software Development 87%

The lean manufacturing toolkit, adapted for software teams: cut waste, ship faster, decide later.

by Mary Poppendieck 2003

4.19

1k+ ratings

🏭 Lean Methodology 🔄 Agile Methods 🚀 Continuous Delivery

Press Reset

by Jason Schreier • 2021

Why game developers lose their jobs after shipping hit games, and who profits.

4.05

8k+

🎮 Video Game Industry 🛠️ Tech Labor ⏰ Crunch Culture

Press Reset 87%

Why game developers lose their jobs after shipping hit games, and who profits.

by Jason Schreier 2021

4.05

8k+ ratings

🎮 Video Game Industry 🛠️ Tech Labor ⏰ Crunch Culture

High Performance JavaScript

by Nicholas C. Zakas • 2010

Fewer DOM touches, shorter scope chains, smarter loading: JS performance without the rewrite.

4.10

596

🧭 Web Performance 📄 Dom Scripting 🔍 Performance Profiling

High Performance JavaScript 87%

Fewer DOM touches, shorter scope chains, smarter loading: JS performance without the rewrite.

by Nicholas C. Zakas 2010

4.10

596 ratings

🧭 Web Performance 📄 Dom Scripting 🔍 Performance Profiling

The Complete Software Developer's Career Guide

by John Sonmez • 2017

One language, one portfolio, one interview strategy: the sequence that turns learners into hires.

4.02

1k+

💼 Software Careers 🚪 Breaking Into Tech 🎯 Technical Interviews

The Complete Software Developer's Career Guide Summary

The Complete Software Developer's Career Guide 87%

One language, one portfolio, one interview strategy: the sequence that turns learners into hires.

by John Sonmez 2017

4.02

1k+ ratings

💼 Software Careers 🚪 Breaking Into Tech 🎯 Technical Interviews

Blood, Sweat, and Pixels

by Jason Schreier • 2017

Behind the scenes of Destiny, Diablo, and Stardew Valley: chaos, crunch, and last-minute saves.

4.20

25k+

🎮 Video Game Development 🎬 Behind The Scenes 📰 Tech Journalism

Blood, Sweat, and Pixels 87%

Behind the scenes of Destiny, Diablo, and Stardew Valley: chaos, crunch, and last-minute saves.

by Jason Schreier 2017

4.20

25k+ ratings

🎮 Video Game Development 🎬 Behind The Scenes 📰 Tech Journalism

Usability Engineering

by Jakob Nielsen • 1993

Usability is engineering, not art. Five dimensions, ten heuristics, one rule: test with real users.

3.97

277

🎯 User-Centered Design 🧪 Usability Testing 🔍 Heuristic Evaluation

Usability Engineering 87%

Usability is engineering, not art. Five dimensions, ten heuristics, one rule: test with real users.

by Jakob Nielsen 1993

3.97

277 ratings

🎯 User-Centered Design 🧪 Usability Testing 🔍 Heuristic Evaluation

The Right It

by Alberto Savoia • 2019

Skill can't save an unwanted idea. Fast, cheap experiments that test market demand before building.

4.30

850

🚀 Startup Methodology ✅ Product Validation 🧪 Lean Experimentation

The Right It 87%

Skill can't save an unwanted idea. Fast, cheap experiments that test market demand before building.

by Alberto Savoia 2019

4.30

850 ratings

🚀 Startup Methodology ✅ Product Validation 🧪 Lean Experimentation

The Board Game Designer's Guide

by Joe Slack • 2017

Design the feeling first. A four-step cycle that turns a rough prototype into a hit.

3.71

🎲 Board Game Design 🔄 Iterative Design 😄 Player Experience

The Board Game Designer's Guide 87%

Design the feeling first. A four-step cycle that turns a rough prototype into a hit.

by Joe Slack 2017

3.71

82 ratings

🎲 Board Game Design 🔄 Iterative Design 😄 Player Experience

Learn Python 3 the Hard Way

by Zed A. Shaw • 2017

Python without the hand-holding: type every line, debug every error, and build from the terminal up.

3.92

597

🐍 Python Programming 💻 Learn To Code ⌨️ Command Line

Learn Python 3 the Hard Way 87%

Python without the hand-holding: type every line, debug every error, and build from the terminal up.

by Zed A. Shaw 2017

3.92

597 ratings

🐍 Python Programming 💻 Learn To Code ⌨️ Command Line

Measuring the User Experience

by Thomas Tullis • 2008

Three metrics that show exactly where users get stuck: task success, time, and errors.

4.08

567

📏 Ux Metrics 🧪 Usability Testing 🔬 Ux Research

Measuring the User Experience 87%

Three metrics that show exactly where users get stuck: task success, time, and errors.

by Thomas Tullis 2008

4.08

567 ratings

📏 Ux Metrics 🧪 Usability Testing 🔬 Ux Research

A Game Design Vocabulary

by Anna Anthropy • 2013

The grammar of game design: how to script a back-and-forth that players lose themselves in.

3.94

134

📗 Game Design ⚙️ Game Mechanics 🧩 Game Systems

A Game Design Vocabulary 87%

The grammar of game design: how to script a back-and-forth that players lose themselves in.

by Anna Anthropy 2013

3.94

134 ratings

📗 Game Design ⚙️ Game Mechanics 🧩 Game Systems

More Joel on Software

by Joel Spolsky • 2008

Ship on schedule, hire developers who skip the job boards, and know when fixing beats rewriting.

4.05

549

🖥️ Software Development 👔 Engineering Management 🤝 Developer Culture

More Joel on Software 87%

Ship on schedule, hire developers who skip the job boards, and know when fixing beats rewriting.

by Joel Spolsky 2008

4.05

549 ratings

🖥️ Software Development 👔 Engineering Management 🤝 Developer Culture

14 Habits of Highly Productive Developers

by Zeno Rocha • 2020

Fourteen habits for developers who want to stop sprinting and start compounding.

4.00

723

🖥️ Software Engineering 💼 Software Careers 🧱 Code Craftsmanship

14 Habits of Highly Productive Developers Summary

14 Habits of Highly Productive Developers 87%

Fourteen habits for developers who want to stop sprinting and start compounding.

by Zeno Rocha 2020

4.00

723 ratings

🖥️ Software Engineering 💼 Software Careers 🧱 Code Craftsmanship

Walden and Other Writings

by Henry David Thoreau • 1854

How to design tabletop games that feel intuitive, balance hope, and keep every player at the table.

3.95

5k+

🧩 Game Design 🎲 Tabletop Games 🧠 Player Psychology

Walden and Other Writings 87%

How to design tabletop games that feel intuitive, balance hope, and keep every player at the table.

by Henry David Thoreau 1854

3.95

5k+ ratings

🧩 Game Design 🎲 Tabletop Games 🧠 Player Psychology

Site Reliability Engineering

by Betsy Beyer • 2016

Google stopped chasing perfect uptime. Its teams got failure budgets, and innovation surged.

4.21

3k+

🏗️ Site Reliability 🔄 Devops Practices 📜 Infrastructure As Code

Site Reliability Engineering 87%

Google stopped chasing perfect uptime. Its teams got failure budgets, and innovation surged.

by Betsy Beyer 2016

4.21

3k+ ratings

🏗️ Site Reliability 🔄 Devops Practices 📜 Infrastructure As Code

The Art of Agile Development

by James Shore • 2007

Weekly deployments and single-digit bug counts: the whole XP practice set that gets you there.

3.98

915

⚙️ Extreme Programming 🔄 Agile Development 🏭 Lean Software

The Art of Agile Development 87%

Weekly deployments and single-digit bug counts: the whole XP practice set that gets you there.

by James Shore 2007

3.98

915 ratings

⚙️ Extreme Programming 🔄 Agile Development 🏭 Lean Software

Persuasive Games

by Ian Bogost • 2007

A videogame's rules are arguments. Learning to read them changes how you see every screen.

3.84

360

🎮 Game Studies 📺 Media Theory 📜 Rhetorical Theory

Persuasive Games 87%

A videogame's rules are arguments. Learning to read them changes how you see every screen.

by Ian Bogost 2007

3.84

360 ratings

🎮 Game Studies 📺 Media Theory 📜 Rhetorical Theory

Start Small, Stay Small

by Rob Walling • 2010

Stop building products for everyone. Pick a niche, build an audience, and market before you code.

3.95

2k+

💰 Bootstrapping 🎯 Niche Markets 🚀 Lean Startup

Start Small, Stay Small 87%

Stop building products for everyone. Pick a niche, build an audience, and market before you code.

by Rob Walling 2010

3.95

2k+ ratings

💰 Bootstrapping 🎯 Niche Markets 🚀 Lean Startup

Release It!

by Michael T. Nygard • 2007

QA says your software is ready. Production disagrees. The patterns that close the gap.

4.25

3k+

🏗️ Software Architecture 🌐 Distributed Systems 🛡️ Fault Tolerance

Release It! 87%

QA says your software is ready. Production disagrees. The patterns that close the gap.

by Michael T. Nygard 2007

4.25

3k+ ratings

🏗️ Software Architecture 🌐 Distributed Systems 🛡️ Fault Tolerance

Evidence-Guided

by Itamar Gilad • 2023

Why most product teams ship the wrong features, and the framework that stops them.

4.46

178

🧭 Product Management 🚀 Lean Startup 🎯 OKRs

Evidence-Guided 87%

Why most product teams ship the wrong features, and the framework that stops them.

by Itamar Gilad 2023

4.46

178 ratings

🧭 Product Management 🚀 Lean Startup 🎯 OKRs

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