diff --git a/src/analysis.rs b/src/analysis.rs
index 9d48828..7149252 100644
--- a/src/analysis.rs
+++ b/src/analysis.rs
@@ -64,8 +64,8 @@ pub(crate) fn analysis<'a>(
             relative_distributions,
             significance_threshold: config.significance_level,
             noise_threshold: config.noise_threshold,
-            base_iter_counts: old_sample.iteration_count.iter().copied().collect(),
-            base_sample_times: old_sample.sample_values.iter().copied().collect(),
+            base_iter_counts: old_sample.iteration_count.to_vec(),
+            base_sample_times: old_sample.sample_values.to_vec(),
             base_avg_times,
             base_estimates: old_estimates.clone(),
         })
diff --git a/src/config.rs b/src/config.rs
index 0f21763..4147332 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -62,7 +62,7 @@ impl Default for Colors {
     }
 }
 
-#[derive(Deserialize, Debug)]
+#[derive(Deserialize, Debug, Default)]
 #[serde(default)]
 /// Struct to hold the various configuration settings that we can read from the TOML config file.
 struct TomlConfig {
@@ -77,16 +77,6 @@ struct TomlConfig {
     /// colorblindness, or just to make things look prettier.
     pub colors: Colors,
 }
-impl Default for TomlConfig {
-    fn default() -> Self {
-        TomlConfig {
-            criterion_home: None,
-            output_format: None,
-            plotting_backend: None,
-            colors: Default::default(),
-        }
-    }
-}
 
 #[derive(Debug)]
 pub enum OutputFormat {
diff --git a/src/connection.rs b/src/connection.rs
index 47001d1..9328422 100644
--- a/src/connection.rs
+++ b/src/connection.rs
@@ -60,10 +60,9 @@ pub struct Connection {
     socket: TcpStream,
     receive_buffer: Vec<u8>,
     send_buffer: Vec<u8>,
-
-    criterion_rs_version: [u8; 3],
-    protocol_version: u16,
-    protocol_format: ProtocolFormat,
+    // criterion_rs_version: [u8; 3],
+    // protocol_version: u16,
+    // protocol_format: ProtocolFormat,
 }
 impl Connection {
     /// Perform the connection handshake and wrap the TCP stream in a Connection object if successful.
@@ -103,10 +102,9 @@ impl Connection {
             socket,
             receive_buffer: vec![],
             send_buffer: vec![],
-
-            criterion_rs_version,
-            protocol_version,
-            protocol_format,
+            // criterion_rs_version,
+            // protocol_version,
+            // protocol_format,
         })
     }
 
diff --git a/src/plot/gnuplot_backend/mod.rs b/src/plot/gnuplot_backend/mod.rs
index e2311d1..22c8cd9 100644
--- a/src/plot/gnuplot_backend/mod.rs
+++ b/src/plot/gnuplot_backend/mod.rs
@@ -35,7 +35,7 @@ mod summary;
 mod t_test;
 
 fn gnuplot_escape(string: &str) -> String {
-    string.replace("_", "\\_").replace("'", "''")
+    string.replace('_', "\\_").replace('\'', "''")
 }
 
 static DEFAULT_FONT: &str = "Helvetica";