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5 Simple C++ Performance Tips That Make a Big Difference

5 Simple C++ Performance Tips That Make a Big Difference 5 Simple C++ Performance Tips That Make a Big Difference C++ is known for its speed, but small inefficiencies can add up fast. Here are 5 simple techniques you can start applying today to make your C++ code faster and cleaner. ✅ 1️⃣ Prefer ++i Over i++ in Loops In most cases, especially with iterators, ++i is faster because it avoids creating a copy of the original value. This reduces overhead in tight loops. ✅ 2️⃣ Pre-allocate Memory with reserve When you know how many elements you’ll store, pre-allocate space to avoid costly reallocations: std::vector<int> data; data.reserve(1000); // Prevents multiple dynamic allocations ✅ 3️⃣ Use emplace_back Instead of push_back emplace_back constructs elements in place, saving unnecessary moves or copies: std::vector<std::string> v; v.reserve(3); v.emplace_back("one"); v.emplace_back("two"); v.emplace_back("three...
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C++20 std::span — Modern Array Views Made Simple

C++20 std::span — Modern Array Views Made Simple C++20 std::span — Modern Array Views Made Simple In C++20, std::span introduces a powerful concept — a non-owning view over a contiguous array . It gives you the safety of range-based access with the efficiency of pointers. ✅ Basic Example #include <span> #include <iostream> void print(std::span<int> data) { for (int x : data) std::cout << x << ' '; } int main() { int arr[] = {10, 20, 30, 40}; print(arr); // Implicitly converts to span } 💡 Why Use std::span? No need to pass raw pointers and sizes separately Works with arrays, vectors, and std::array Doesn't take ownership — safe and lightweight 🛠️ Use Cases in Embedded/Freelance Work Sensor data buffers DMA or audio frame processing Protocol parsing functions 📥 Download the C++20 Cheatsheet 📥 Download PDF 🧠 Cheatsheet by ...
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Concepts in C++20: Type Safety Made Simple

Concepts in C++20: Type Safety Made Simple Concepts in C++20: Type Safety Made Simple Are you still using enable_if and SFINAE hacks to constrain templates? Meet C++20 concepts — a cleaner, safer, and readable way to express intent. 💡 What is a Concept? A concept is a compile-time predicate that checks template type requirements. 🔍 Example: Constraining to Integers ✅ C++20 Concepts #include <concepts> template<std::integral T> T add(T a, T b) { return a + b; } 🛠️ Pre-C++20 with enable_if #include <type_traits> template<typename T> typename std::enable_if<std::is_integral<T>::value, T>::type add(T a, T b) { return a + b; } Concepts make the intent clear and the code simpler. 📥 Bonus Download 📘 Download: C++20 Cheatsheet (PDF) This one-page reference includes modern C++20 features like concepts, coroutines, ranges, consteval, and more — ideal for embedded and freelance develope...
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C++17 vs C++20 – Key Feature Differences

C++17 vs C++20: Top 5 Modern Features Compared (with Examples) C++17 vs C++20: Top 5 Modern Features Compared (with Examples) Are you transitioning from C++17 to C++20 or working on mixed codebases? Here are the 5 most important feature differences you need to know, with simple examples : 1. Structured Bindings (C++17) vs Designated Initializers (C++20) std::pair<int, std::string> p = {1, "apple"}; auto [id, name] = p; struct Fruit { int id; std::string name; }; Fruit f = {.name = "apple", .id = 1}; 2. if constexpr (C++17) vs Concepts (C++20) template<typename T> void print_type(T value) { if constexpr (std::is_integral_v<T>) { std::cout << "Integer: " << value << "\n"; } else { std::cout << "Other: " << value << "\n"; } } template<std::integral T> void print_integral(T value) { std::cout << ...
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C++17 Cheatsheet for Embedded Developers

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📘 C++17 Cheatsheet for Embedded Developers Are you a C++ developer working on embedded systems, IoT, or freelance firmware projects? This one-page cheatsheet covers the most practical C++17 features that help you write safer, faster, and more modern code. ✅ What's Inside Structured Bindings if constexpr for compile-time branching std::optional , std::variant , std::filesystem Fold Expressions Inline Variables 📥 Download the PDF Click below to download your free copy of the C++17 Cheatsheet: 📥 Download C++17 Cheatsheet (PDF) 💡 Stay tuned for more C++ and embedded resources. Don’t forget to check our other technical posts at Tamizhi Technologies Blog . C++17 Embedded Systems Freelance Developer Cheatsheet Modern C++
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Top 5 Modern C++ Features I Use in Real Projects

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Top 5 Modern C++ Features I Use in Real Projects (And Why) C++ has come a long way — from raw pointers and manual memory management to smart pointers, auto , and std::optional . But in real-world projects, especially in embedded or freelance environments, we don’t always get to use the latest standard. Still, when I can, these 5 modern C++ features make my code safer, cleaner, and easier to maintain . 1. auto for Type Inference auto it = myMap.begin(); Why I use it: Avoids redundant typing. Cleaner, especially with complex STL types. Caution: Don’t overuse it — make sure types remain readable. 2. std::optional (C++17) std::optional<int> getValue(bool valid) { if (valid) return 42; return std::nullopt; } Why I use it: Eliminates magic return values like -1 or null pointers. Use case: Embedded menu systems, sensor values, config parsing. 3. Lambdas std::sort(vec.begin(), vec.end(), [](auto a, auto b) { return a.value < b.value; }); Why...
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🚀 C++ Versions vs Features: What Every Developer Should Know

🛠️ Modern C++ Explained: From C++11 to C++23 Keeping up with the evolving C++ standards is more than a matter of preference—it’s a professional necessity . Over the past decade, C++ has transformed dramatically, introducing features that make code cleaner, safer, and more efficient . Whether you're maintaining legacy systems or building modern high-performance applications, understanding the differences between C++11 , C++14 , C++17 , C++20 , and C++23 is crucial. Here’s a practical, no-fluff breakdown of what each version brings to your codebase. 👇 🔹 C++11 – The Game Changer Released in 2011, C++11 marks the beginning of modern C++ . It introduced essential features that dramatically changed how developers write and manage code. Key Features: auto , range-based for loops Lambda expressions Smart pointers ( std::unique_ptr , std::shared_ptr ) Move semantics nullptr , enum class , constexpr Multithreading support with <thread> Why it ...
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