avoid unnecessary vector copy
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@@ -540,7 +540,7 @@ public:
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PVStringArray::shared_pointer allChannelNames = result->getSubField<PVStringArray>("value");
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ChannelListRequesterImpl::shared_pointer listListener(new ChannelListRequesterImpl());
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std::vector<ChannelProvider::shared_pointer> providers = m_serverContext->getChannelProviders();
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std::vector<ChannelProvider::shared_pointer>& providers = m_serverContext->getChannelProviders();
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size_t providerCount = providers.size();
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for (size_t i = 0; i < providerCount; i++)
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