Performance tweaks #3468
Performance tweaks #3468
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| lua_newtable(L); | ||
| for (auto i : l) { | ||
| for (auto* i : l) { |
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| for (auto* i : l) { | |
| for (const auto* i : l) { |
The original code was written about 8 years ago, the author is no longer involved in development.
If I had to guess why they used value copy mechanism, I would say they wanted to avoid any chance to modify the value on Lua stack (except for intentional change with setvar()).
If we want to keep this restriction, please consider to use const modifier here.
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| for (auto z : m_ranges) { | ||
| for (auto& z : m_ranges) { |
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| for (auto& z : m_ranges) { | |
| for (const auto& z : m_ranges) { |
Please see cppcheck's warning:
warning: src/rules_exceptions.cc,198,style,constVariableReference,Variable 'z' can be declared as reference to const
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| } | ||
| for (auto b : from->m_ranges) { | ||
| for (auto& b : from->m_ranges) { |
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| for (auto& b : from->m_ranges) { | |
| for (const auto& b : from->m_ranges) { |
Please see cppcheck's warning:
warning: src/rules_exceptions.cc,215,style,constVariableReference,Variable 'b' can be declared as reference to const
| strlen("messages")); | ||
| yajl_gen_array_open(g); | ||
| for (auto a : m_rulesMessages) { | ||
| for (auto& a : m_rulesMessages) { |
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| for (auto& a : m_rulesMessages) { | |
| for (const auto& a : m_rulesMessages) { |
Probably here you could use const too.
| strlen("tags")); | ||
| yajl_gen_array_open(g); | ||
| for (auto b : a.m_tags) { | ||
| for (auto& b : a.m_tags) { |
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| for (auto& b : a.m_tags) { | |
| for (const auto& b : a.m_tags) { |
Probably here you could use const too.
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I was not sure if there was any restriction not to use const, thats why i asked. I could extend the PR with more positions for "const auto&" if you like. |
Sure, go! If the tests will be passed, I'll be happy :). Btw you could review the tests too, may be you will find some lack there too (for eg. you're checking the code...) |
2 participants
what
Range based for loops with references are already used in this project, but in a few places not.
I am not sure why. I changed this code locations and executed unit tests.
Also use '*' for pointers when using auto keyword, makes it more readable.
why
Improve performance a little bit.
questions
"const auto&" could also be used in many places. Is there a reason why it is not used?