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2365Cache lines, associativity, and capacity misses
2366Traversal order for multidimensional arrays
2367Pointer chasing and memory-level parallelism
2368Prefetching usefulness and pollution
2369Software prefetch distance tuning
2370TLB misses and page-size tradeoffs
2371NUMA locality and first-touch allocation
2372NUMA-aware partitioning of work
2373Reducing false sharing in worker outputs
2374Data-oriented entity storage
2375Batching operations to amortize overhead
2376Branch prediction and data-dependent control flow
2377Branchless transforms and extra-work tradeoffs
2378Lookup tables versus conditional logic
2379Inlining heuristics and code-size growth
2380Devirtualization through final and whole-program visibility
2381Speculative devirtualization guards
2382Small-buffer optimization size selection
2383Allocation pooling versus general-purpose allocators
2384Reducing reference-count traffic in shared ownership
2385String allocation elimination with borrowed views
2386Copy elision in measured hot paths
2387Link-time optimization and cross-TU inlining
2388ThinLTO scalability tradeoffs
2389Identical code folding and function merging
2390Dead stripping unused library sections
2391Cold-path outlining and binary layout
2392Fast-math flags and numerical contracts
2393Avoiding benchmark-only optimizations
2394Performance regression budgets in CI
2395Instrumentation-based PGO training builds
2396Merging LLVM profile data with llvm-profdata
2397GCC profile generation and profile use
2398Representative PGO training workloads
2399Profile mismatches and stale data
2400Sample-based PGO with AutoFDO
2401Context-sensitive PGO for call paths
2402PGO-driven indirect-call promotion
2403PGO function and block placement
2404Combining LTO and PGO
2405BOLT post-link optimization prerequisites
2406Collecting perf profiles for BOLT
2407Converting samples with perf2bolt
2408BOLT function reordering strategies
2409BOLT basic-block reordering
2410BOLT exception and debug-info considerations
2411Measuring startup separately from steady state
2412Optimizing shared libraries with BOLT
2413Comparing PGO and BOLT benefits experimentally
2414Reproducible optimization pipelines
2415std::expected value and error observers
2416std::unexpected construction and deduction
2417expected<void, E> for fallible commands
2418expected::and_then error propagation
2419expected::transform value mapping
2420expected::or_else recovery
2421expected::transform_error error translation
2422expected exception behavior on invalid value access
2423std::flat_map split key-value storage
2424flat_map sorted_unique construction contracts
2425flat_map insertion and invalidation costs
2426flat_map extract and replace
2427std::flat_multimap equivalent-key storage
2428flat_set and flat_multiset in C++23
2429std::stacktrace capture and frame inspection
2430Stacktrace symbol resolution and deployment
2431Stacktrace allocation during failure handling
2432std::byteswap for integral representations
2433std::to_underlying for scoped-enum interop
2434std::unreachable and violated assumptions
2435std::out_ptr for C output-pointer APIs
2436std::inout_ptr and resource replacement
2437std::start_lifetime_as for implicit-lifetime storage
2438std::forward_like qualifier propagation
2439std::invoke_r explicit result conversion
2440Heterogeneous erasure in associative containers
2441Container range constructors and insert_range
2442std::string::resize_and_overwrite callback contracts
2443std::basic_string::contains and string_view::contains
2444std::ios_base::noreplace exclusive file creation
2445Feature-test macros for staged C++26 adoption
2446C++26 pack indexing expressions and types
2447C++26 structured binding packs
2448C++26 deleted functions with diagnostic messages
2449C++26 user-generated static_assert messages
2450C++26 placeholder variables for unused bindings
2451C++26 variadic friend declarations
2452C++26 trivial unions and lifetime implications
2453C++26 erroneous values and uninitialized reads
2454C++26 hardened library preconditions
2455C++26 contracts syntax and evaluation semantics
2456C++26 reflection metadata fundamentals
2457C++26 reflection splicing and generated declarations
2458C++26 expansion statements over compile-time sequences
2459C++26 std::inplace_vector fixed-capacity storage
2460C++26 std::hive stable-element container
2461C++26 std::optional<T&> reference semantics
2462C++26 optional range support
2463C++26 std::copyable_function
2464C++26 std::function_ref borrowing lifetimes
2465C++26 hazard-pointer library facilities
2466C++26 RCU library facilities
2467C++26 saturation arithmetic functions
2468C++26 std::linalg interfaces over mdspan
2469C++26 std::text_encoding environment queries
2470C++26 debugging support and breakpoint functions
2471C++26 std::is_within_lifetime
2472C++26 constexpr math library expansion
2473C++26 constexpr atomic support
2474Tracking draft changes separately from compiler extensions
2475Vendor library support versus compiler language support
2476Portable fallbacks with feature-gated implementations

2365Cache lines, associativity, and capacity misses
2366Traversal order for multidimensional arrays
2367Pointer chasing and memory-level parallelism
2368Prefetching usefulness and pollution
2369Software prefetch distance tuning
2370TLB misses and page-size tradeoffs
2371NUMA locality and first-touch allocation
2372NUMA-aware partitioning of work
2373Reducing false sharing in worker outputs
2374Data-oriented entity storage
2375Batching operations to amortize overhead
2376Branch prediction and data-dependent control flow
2377Branchless transforms and extra-work tradeoffs
2378Lookup tables versus conditional logic
2379Inlining heuristics and code-size growth
2380Devirtualization through final and whole-program visibility
2381Speculative devirtualization guards
2382Small-buffer optimization size selection
2383Allocation pooling versus general-purpose allocators
2384Reducing reference-count traffic in shared ownership
2385String allocation elimination with borrowed views
2386Copy elision in measured hot paths
2387Link-time optimization and cross-TU inlining
2388ThinLTO scalability tradeoffs
2389Identical code folding and function merging
2390Dead stripping unused library sections
2391Cold-path outlining and binary layout
2392Fast-math flags and numerical contracts
2393Avoiding benchmark-only optimizations
2394Performance regression budgets in CI
2395Instrumentation-based PGO training builds
2396Merging LLVM profile data with llvm-profdata
2397GCC profile generation and profile use
2398Representative PGO training workloads
2399Profile mismatches and stale data
2400Sample-based PGO with AutoFDO
2401Context-sensitive PGO for call paths
2402PGO-driven indirect-call promotion
2403PGO function and block placement
2404Combining LTO and PGO
2405BOLT post-link optimization prerequisites
2406Collecting perf profiles for BOLT
2407Converting samples with perf2bolt
2408BOLT function reordering strategies
2409BOLT basic-block reordering
2410BOLT exception and debug-info considerations
2411Measuring startup separately from steady state
2412Optimizing shared libraries with BOLT
2413Comparing PGO and BOLT benefits experimentally
2414Reproducible optimization pipelines
2415std::expected value and error observers
2416std::unexpected construction and deduction
2417expected<void, E> for fallible commands
2418expected::and_then error propagation
2419expected::transform value mapping
2420expected::or_else recovery
2421expected::transform_error error translation
2422expected exception behavior on invalid value access
2423std::flat_map split key-value storage
2424flat_map sorted_unique construction contracts
2425flat_map insertion and invalidation costs
2426flat_map extract and replace
2427std::flat_multimap equivalent-key storage
2428flat_set and flat_multiset in C++23
2429std::stacktrace capture and frame inspection
2430Stacktrace symbol resolution and deployment
2431Stacktrace allocation during failure handling
2432std::byteswap for integral representations
2433std::to_underlying for scoped-enum interop
2434std::unreachable and violated assumptions
2435std::out_ptr for C output-pointer APIs
2436std::inout_ptr and resource replacement
2437std::start_lifetime_as for implicit-lifetime storage
2438std::forward_like qualifier propagation
2439std::invoke_r explicit result conversion
2440Heterogeneous erasure in associative containers
2441Container range constructors and insert_range
2442std::string::resize_and_overwrite callback contracts
2443std::basic_string::contains and string_view::contains
2444std::ios_base::noreplace exclusive file creation
2445Feature-test macros for staged C++26 adoption
2446C++26 pack indexing expressions and types
2447C++26 structured binding packs
2448C++26 deleted functions with diagnostic messages
2449C++26 user-generated static_assert messages
2450C++26 placeholder variables for unused bindings
2451C++26 variadic friend declarations
2452C++26 trivial unions and lifetime implications
2453C++26 erroneous values and uninitialized reads
2454C++26 hardened library preconditions
2455C++26 contracts syntax and evaluation semantics
2456C++26 reflection metadata fundamentals
2457C++26 reflection splicing and generated declarations
2458C++26 expansion statements over compile-time sequences
2459C++26 std::inplace_vector fixed-capacity storage
2460C++26 std::hive stable-element container
2461C++26 std::optional<T&> reference semantics
2462C++26 optional range support
2463C++26 std::copyable_function
2464C++26 std::function_ref borrowing lifetimes
2465C++26 hazard-pointer library facilities
2466C++26 RCU library facilities
2467C++26 saturation arithmetic functions
2468C++26 std::linalg interfaces over mdspan
2469C++26 std::text_encoding environment queries
2470C++26 debugging support and breakpoint functions
2471C++26 std::is_within_lifetime
2472C++26 constexpr math library expansion
2473C++26 constexpr atomic support
2474Tracking draft changes separately from compiler extensions
2475Vendor library support versus compiler language support
2476Portable fallbacks with feature-gated implementations

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Lesson 2404 of 2,476·26. Optimization and Evolving C++Free lesson

Combining LTO and PGO

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