diff --git a/.circleci/config.yml b/.circleci/config.yml
index 72607c8..dc6bb7f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ version: 2.1
 jobs:
   ctest:
     docker:
-      - image: git.wntrmute.dev/sc/dev:main
+      - image: git.wntrmute.dev/sc/dev:alpine
     steps:
       - checkout
       - run:
@@ -12,19 +12,8 @@ jobs:
       - run:
           name: Valgrind checks.
           command: cmake-run-valgrind.sh
-  NOT_REQUIRED_static_analysis:
-    docker:
-      - image: git.wntrmute.dev/sc/dev:main
-    steps:
-      - checkout
-      - run:
-          name: Trunk check
-          command: ./trunk check --upstream=HEAD^
 
 workflows:
   ctest:
     jobs:
       - ctest
-  static_analysis:
-    jobs:
-      - NOT_REQUIRED_static_analysis
diff --git a/CMakeLists.txt b/CMakeLists.txt
index bda30d7..084f752 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.22)
 project(scsl LANGUAGES CXX
-        VERSION 0.2.5
+        VERSION 1.0.0
         DESCRIPTION "Shimmering Clarity Standard Library")
 
 set(CMAKE_CXX_STANDARD 14)
diff --git a/include/scsl/SimpleConfig.h b/include/scsl/SimpleConfig.h
index 2367329..550bf0d 100644
--- a/include/scsl/SimpleConfig.h
+++ b/include/scsl/SimpleConfig.h
@@ -89,7 +89,7 @@ public:
 	///
 	/// \param prefix The prefix to prepend to the key when looking
 	///        up values from the environment.
-	static void		SetPrefixGlobal(const std::string prefix);
+	static void		SetPrefixGlobal(const std::string &prefix);
 
 	/// \brief Return the keys cached in the config.
 	///
@@ -108,7 +108,7 @@ public:
 	/// \param key The key to look up. See the class documentation
 	///        for information on how this is used.
 	/// \return The value stored under the key, or an empty string.
-	static std::string	GetGlobal(std::string key);
+	static std::string	GetGlobal(std::string &key);
 
 	/// \brief Get the value stored for the key from the config.
 	///
@@ -120,7 +120,7 @@ public:
 	///        value is stored under the key.
 	/// \return The value stored under the key, or the default
 	///         value.
-	static std::string	GetGlobal(std::string key, std::string defaultValue);
+	static std::string	GetGlobal(std::string &key, const std::string &defaultValue);
 #endif
 
 	/// \brief The constructor doesn't need any initialisation.
@@ -128,7 +128,7 @@ public:
 
 	/// \brief The constructor can explicitly set the environment
 	///	   prefix.
-	SimpleConfig(std::string prefix);
+	explicit SimpleConfig(std::string &prefix);
 
 	/// \brief Load key-value pairs from a file.
 	///
@@ -146,7 +146,7 @@ public:
 	///
 	/// \param prefix The prefix to prepend to the key when looking
 	///        up values from the environment.
-	void	SetPrefix(const std::string prefix);
+	void	SetPrefix(const std::string &prefix);
 
 	/// \brief Return the keys cached in the config.
 	///
@@ -161,7 +161,7 @@ public:
 	/// \param key The key to look up. See the class documentation
 	///        for information on how this is used.
 	/// \return The value stored under the key, or an empty string.
-	std::string	Get(std::string key);
+	std::string	Get(std::string &key);
 
 	/// \brief Get the value stored for the key from the config.
 	///
@@ -171,7 +171,7 @@ public:
 	///        value is stored under the key.
 	/// \return The value stored under the key, or the default
 	///         value.
-	std::string	Get(std::string key, std::string defaultValue);
+	std::string	Get(std::string &key, std::string defaultValue);
 
 private:
 	std::string 				envPrefix;
diff --git a/src/sl/SimpleConfig.cc b/src/sl/SimpleConfig.cc
index 7e52327..78fcd13 100644
--- a/src/sl/SimpleConfig.cc
+++ b/src/sl/SimpleConfig.cc
@@ -63,7 +63,7 @@ SimpleConfig::LoadGlobal(std::string &path)
 
 
 void
-SimpleConfig::SetPrefixGlobal(const std::string prefix)
+SimpleConfig::SetPrefixGlobal(const std::string &prefix)
 {
 	globalConfig.SetPrefix(prefix);
 }
@@ -77,14 +77,14 @@ SimpleConfig::KeyListGlobal()
 
 
 std::string
-SimpleConfig::GetGlobal(std::string key)
+SimpleConfig::GetGlobal(std::string &key)
 {
 	return globalConfig.Get(key);
 }
 
 
 std::string
-SimpleConfig::GetGlobal(std::string key, std::string defaultValue)
+SimpleConfig::GetGlobal(std::string &key, const std::string &defaultValue)
 {
 	return globalConfig.Get(key, defaultValue);
 }
@@ -95,7 +95,7 @@ SimpleConfig::SimpleConfig()
 }
 
 
-SimpleConfig::SimpleConfig(std::string prefix)
+SimpleConfig::SimpleConfig(std::string &prefix)
 : envPrefix(prefix)
 {
 }
@@ -140,21 +140,21 @@ SimpleConfig::Load(std::string &path)
 
 
 void
-SimpleConfig::SetPrefix(const std::string prefix)
+SimpleConfig::SetPrefix(const std::string &prefix)
 {
 	this->envPrefix = std::move(prefix);
 }
 
 
 std::string
-SimpleConfig::Get(std::string key)
+SimpleConfig::Get(std::string &key)
 {
 	return this->Get(key, "");
 }
 
 
 std::string
-SimpleConfig::Get(std::string key, std::string defaultValue)
+SimpleConfig::Get(std::string &key, std::string defaultValue)
 {
 	if (this->vars.count(key)) {
 		return this->vars[key];
@@ -168,7 +168,7 @@ SimpleConfig::Get(std::string key, std::string defaultValue)
 		return this->Get(key);
 	}
 
-	this->vars[key] = defaultValue;
+	this->vars[key] = std::move(defaultValue);
 	return this->Get(key);
 }
 
@@ -178,10 +178,8 @@ SimpleConfig::KeyList()
 {
 	std::vector<std::string>	keyList;
 
-	for (auto &entry : this->vars) {
-		keyList.push_back(entry.first);
-	}
-
+	std::transform(this->vars.begin(), this->vars.end(), std::back_inserter(keyList),
+		       [](std::pair<std::string, std::string> pair){return pair.first;});
 	return keyList;
 }