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Performance tweaks #3468

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Performance tweaks #3468

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907d7f8
Use reference in range-based for loop
edding3000 Nov 20, 2025
12671d1
Use explicit '*' with auto for pointers
edding3000 Nov 20, 2025
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2 changes: 1 addition & 1 deletion src/engine/lua.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -297,7 +297,7 @@ int Lua::getvars(lua_State *L) {
variables::Variable::stringMatchResolveMulti(t, varname, &l);

lua_newtable(L);
for (auto i : l) {
for (auto* i : l) {
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@airween airween Nov 20, 2025

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Suggested change
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.

lua_pushnumber(L, idx);
lua_newtable(L);

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4 changes: 2 additions & 2 deletions src/rules_exceptions.cc
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Expand Up @@ -195,7 +195,7 @@ bool RulesExceptions::contains(int a) {
}
}

for (auto z : m_ranges) {
for (auto& z : m_ranges) {
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@airween airween Nov 20, 2025

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Suggested change
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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@airween airween Nov 20, 2025

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Sonarcloud also reports this.

if (z.first <= a && z.second >= a) {
return true;
}
Expand All @@ -212,7 +212,7 @@ bool RulesExceptions::merge(RulesExceptions *from) {
return ret;
}
}
for (auto b : from->m_ranges) {
for (auto& b : from->m_ranges) {
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@airween airween Nov 20, 2025

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Suggested change
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

bool ret = addRange(b.first, b.second);
if (ret == false) {
return ret;
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4 changes: 2 additions & 2 deletions src/transaction.cc
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Expand Up @@ -1700,7 +1700,7 @@ std::string Transaction::toJSON(int parts) {
reinterpret_cast<const unsigned char*>("messages"),
strlen("messages"));
yajl_gen_array_open(g);
for (auto a : m_rulesMessages) {
for (auto& a : m_rulesMessages) {
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@airween airween Nov 20, 2025

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Suggested change
for (auto& a : m_rulesMessages) {
for (const auto& a : m_rulesMessages) {

Probably here you could use const too.

yajl_gen_map_open(g);
LOGFY_ADD("message", a.m_message);
yajl_gen_string(g,
Expand All @@ -1721,7 +1721,7 @@ std::string Transaction::toJSON(int parts) {
reinterpret_cast<const unsigned char*>("tags"),
strlen("tags"));
yajl_gen_array_open(g);
for (auto b : a.m_tags) {
for (auto& b : a.m_tags) {
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@airween airween Nov 20, 2025

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Suggested change
for (auto& b : a.m_tags) {
for (const auto& b : a.m_tags) {

Probably here you could use const too.

yajl_gen_string(g,
reinterpret_cast<const unsigned char*>(b.data()),
b.length());
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