Prompt
Choose efficient data structures and algorithms to minimize computational overhead and improve performance. This involves selecting appropriate containers based on usage patterns, avoiding unnecessary operations like redundant copies or conversions, and leveraging optimized library functions.
Key practices:
- Use performance-optimized containers like
absl::flat_hash_mapinstead ofstd::unordered_map, orbase::MakeFixedFlatSetfor compile-time known sets - Avoid redundant type conversions or parsing by consolidating logic in a single location
- Eliminate unnecessary copies in loops by using references (
const auto& item) or range-based algorithms - Prefer standard library algorithms like
base::ranges::any_ofover custom implementations - Use direct object comparisons instead of converting to intermediate representations when possible
- Avoid unnecessary
std::moveon temporary values that already have move semantics
Example of optimization:
// Less efficient - custom loop with copies
for (size_t i = 0; i < val.planes.size(); ++i) {
auto plane = val.planes[i]; // Unnecessary copy
// process plane...
}
// More efficient - range-based with references
for (const auto& plane : val.planes) {
// process plane...
}
// Even better - use library algorithms when applicable
auto v8_planes = base::ToVector(val.planes, [isolate](const auto& plane) {
// transform logic...
});
This approach reduces computational complexity, memory usage, and improves overall performance by making algorithmic choices that align with actual usage patterns.