Add container-performance-choice opengrep rule for Chromium#862
Add container-performance-choice opengrep rule for Chromium#862
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| void BadExamples() { | ||
| // SHOULD TRIGGER: std::map for small/simple usage (consider base::flat_map) | ||
| // ruleid: chromium-std-map-performance-consideration | ||
| std::map<std::string, int> small_cache; |
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[opengrep] Consider using base::flat_map/base::flat_set instead of std::map/std::set
for small containers or write-once scenarios. Chromium guidelines suggest:
- Use base::flat_map for small collections (< ~100 elements)
- Use base::flat_map for write-once, read-many scenarios
- Only use std::map for large containers with frequent writes
- Use std::map if you need pointer stability
Source: https://github.com/brave/security-action/blob/main/assets/opengrep_rules/client/container-performance-choice.yaml
Cc @thypon @cdesouza-chromium
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| // SHOULD TRIGGER: std::set for small collections (consider base::flat_set) | ||
| // ruleid: chromium-std-map-performance-consideration | ||
| std::set<int> small_ids; |
There was a problem hiding this comment.
reported by reviewdog 🐶
[opengrep] Consider using base::flat_map/base::flat_set instead of std::map/std::set
for small containers or write-once scenarios. Chromium guidelines suggest:
- Use base::flat_map for small collections (< ~100 elements)
- Use base::flat_map for write-once, read-many scenarios
- Only use std::map for large containers with frequent writes
- Use std::map if you need pointer stability
Source: https://github.com/brave/security-action/blob/main/assets/opengrep_rules/client/container-performance-choice.yaml
Cc @thypon @cdesouza-chromium
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| // SHOULD TRIGGER: std::multimap usage (consider alternatives) | ||
| // ruleid: chromium-std-map-performance-consideration | ||
| std::multimap<std::string, std::string> headers; |
There was a problem hiding this comment.
reported by reviewdog 🐶
[opengrep] Consider using base::flat_map/base::flat_set instead of std::map/std::set
for small containers or write-once scenarios. Chromium guidelines suggest:
- Use base::flat_map for small collections (< ~100 elements)
- Use base::flat_map for write-once, read-many scenarios
- Only use std::map for large containers with frequent writes
- Use std::map if you need pointer stability
Source: https://github.com/brave/security-action/blob/main/assets/opengrep_rules/client/container-performance-choice.yaml
Cc @thypon @cdesouza-chromium
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| // SHOULD TRIGGER: std::multiset usage (consider alternatives) | ||
| // ruleid: chromium-std-map-performance-consideration | ||
| std::multiset<int> duplicate_values; |
There was a problem hiding this comment.
reported by reviewdog 🐶
[opengrep] Consider using base::flat_map/base::flat_set instead of std::map/std::set
for small containers or write-once scenarios. Chromium guidelines suggest:
- Use base::flat_map for small collections (< ~100 elements)
- Use base::flat_map for write-once, read-many scenarios
- Only use std::map for large containers with frequent writes
- Use std::map if you need pointer stability
Source: https://github.com/brave/security-action/blob/main/assets/opengrep_rules/client/container-performance-choice.yaml
Cc @thypon @cdesouza-chromium
| private: | ||
| // SHOULD TRIGGER: No justification for std::map usage | ||
| // ruleid: chromium-std-map-performance-consideration | ||
| std::map<std::string, bool> feature_flags_; |
There was a problem hiding this comment.
reported by reviewdog 🐶
[opengrep] Consider using base::flat_map/base::flat_set instead of std::map/std::set
for small containers or write-once scenarios. Chromium guidelines suggest:
- Use base::flat_map for small collections (< ~100 elements)
- Use base::flat_map for write-once, read-many scenarios
- Only use std::map for large containers with frequent writes
- Use std::map if you need pointer stability
Source: https://github.com/brave/security-action/blob/main/assets/opengrep_rules/client/container-performance-choice.yaml
Cc @thypon @cdesouza-chromium
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| // SHOULD TRIGGER: std::map not ideal for write-once scenario | ||
| // ruleid: chromium-std-map-performance-consideration | ||
| std::map<std::string, int> limits; |
There was a problem hiding this comment.
reported by reviewdog 🐶
[opengrep] Consider using base::flat_map/base::flat_set instead of std::map/std::set
for small containers or write-once scenarios. Chromium guidelines suggest:
- Use base::flat_map for small collections (< ~100 elements)
- Use base::flat_map for write-once, read-many scenarios
- Only use std::map for large containers with frequent writes
- Use std::map if you need pointer stability
Source: https://github.com/brave/security-action/blob/main/assets/opengrep_rules/client/container-performance-choice.yaml
Cc @thypon @cdesouza-chromium
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Suggest base::flat_map over std::map for better performance with small datasets, following Chromium performance guidelines.
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Opengrep Findings📈 Comparison Results
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Supersedes: #855