diff --git a/src/compression_engine.rs b/src/compression_engine.rs
index a6049db..970197d 100755
--- a/src/compression_engine.rs
+++ b/src/compression_engine.rs
@@ -70,7 +70,7 @@ pub trait CompressionEngine {
         let args = ["-bE", "-"];
 
         let process = Command::new(program)
-            .args(args.clone())
+            .args(args)
             .stdin(Stdio::piped())
             .stdout(Stdio::piped())
             .spawn()
@@ -101,7 +101,7 @@ pub trait CompressionEngine {
                 break;
             }
 
-            size = size + n;
+            size += n;
         }
 
         Ok(size)
diff --git a/src/db.rs b/src/db.rs
index 10cef95..21b1751 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -121,7 +121,7 @@ pub fn query_upsert_meta(conn: &Connection, meta: Meta) -> Result<()> {
 
 pub fn store_meta(conn: &Connection, meta: Meta) -> Result<()> {
     debug!("DB: Storing meta: {:?}", meta);
-    if meta.value.eq("") {
+    if meta.value.is_empty() {
         query_delete_meta(conn, meta)?;
     } else {
         query_upsert_meta(conn, meta)?;
diff --git a/src/digest_engine.rs b/src/digest_engine.rs
index 047bdbb..91d64cc 100644
--- a/src/digest_engine.rs
+++ b/src/digest_engine.rs
@@ -1,4 +1,4 @@
-use anyhow::{anyhow, Context, Result};
+use anyhow::Result;
 use std::io;
 
 use lazy_static::lazy_static;
diff --git a/src/modes/list.rs b/src/modes/list.rs
index 32132cf..ff973d5 100644
--- a/src/modes/list.rs
+++ b/src/modes/list.rs
@@ -71,7 +71,7 @@ pub fn mode_list(
     let mut title_row = row!();
 
     for column in list_format.clone() {
-        let mut column_format = column.split(":").into_iter();
+        let mut column_format = column.split(":");
         let column_name = column_format.next().expect("Unable to parse column name");
         let column_type = ColumnType::from_str(column_name)
             .map_err(|_| anyhow!("Unknown column {:?}", column_name))?;
@@ -98,10 +98,10 @@ pub fn mode_list(
         let mut table_row = Row::new(vec![]);
 
         for column in list_format.clone() {
-            let mut column_format = column.split(":").into_iter();
+            let mut column_format = column.split(":");
             let column_name = column_format.next().expect("Unable to parse column name");
             let column_type = ColumnType::from_str(column_name)
-                .expect(format!("Unknown column {:?}", column_name).as_str());
+                .unwrap_or_else(|_| panic!("Unknown column {:?}", column_name));
             let mut meta_name: Option<&str> = None;
 
             if column_type == ColumnType::Meta {
@@ -145,7 +145,7 @@ pub fn mode_list(
                 ColumnType::FileSize => match item_path.metadata() {
                     Ok(metadata) => Cell::new_align(
                         &size_column(
-                            metadata.len() as u64,
+                            metadata.len(),
                             args.options.human_readable,
                             column_width,
                         ),
diff --git a/src/modes/save.rs b/src/modes/save.rs
index 109a284..913ef1a 100644
--- a/src/modes/save.rs
+++ b/src/modes/save.rs
@@ -12,6 +12,7 @@ use rusqlite::Connection;
 
 use crate::db::{self};
 use crate::digest_engine::{get_engine, DigestEngine, DigestType};
+use crate::compression_engine::{get_engine, CompressionEngine, CompressionType};
 use crate::modes::common::get_meta_from_env;
 use chrono::Utc;
 
@@ -49,8 +50,7 @@ pub fn mode_save(
 
     use gethostname::gethostname;
     use std::io::Write;
-    let compression_type_opt =
-        crate::compression_engine::CompressionType::from_str(&compression_name);
+    let compression_type_opt = CompressionType::from_str(&compression_name);
     if compression_type_opt.is_err() {
         cmd.error(
             ErrorKind::InvalidValue,
@@ -73,7 +73,7 @@ pub fn mode_save(
         compression: compression_type.to_string(),
     };
 
-    let id = db::insert_item(&conn, item.clone())?;
+    let id = db::insert_item(conn, item.clone())?;
     item.id = Some(id);
     debug!("MAIN: Added item {:?}", item.clone());
 
@@ -100,7 +100,7 @@ pub fn mode_save(
         }
     }
 
-    db::set_item_tags(&conn, item.clone(), tags)?;
+    db::set_item_tags(conn, item.clone(), tags)?;
 
     let mut item_meta: HashMap<String, String> = get_meta_from_env();
 
@@ -121,7 +121,7 @@ pub fn mode_save(
             name: kv.0.to_string(),
             value: kv.1.to_string(),
         };
-        db::store_meta(&conn, meta)?;
+        db::store_meta(conn, meta)?;
     }
 
     let mut item_path = data_path.clone();
@@ -168,7 +168,7 @@ pub fn mode_save(
     let digest = digest_engine.finalize()?;
     debug!("DIGEST: {}", digest);
 
-    db::update_item(&conn, item.clone())?;
+    db::update_item(conn, item.clone())?;
 
     Ok(())
 }
diff --git a/src/modes/status.rs b/src/modes/status.rs
index 405f9d3..08394a0 100644
--- a/src/modes/status.rs
+++ b/src/modes/status.rs
@@ -100,7 +100,7 @@ pub fn mode_status(
                 true => Cell::new("Yes").with_style(Attr::ForegroundColor(color::GREEN)),
                 false => Cell::new("No"),
             },
-            match compression_program.program.eq("") {
+            match compression_program.program.is_empty() {
                 true => {
                     Cell::new("<INTERNAL>").with_style(Attr::ForegroundColor(color::BRIGHT_BLACK))
                 }
diff --git a/src/modes/update.rs b/src/modes/update.rs
index 1ed844e..0256f52 100644
--- a/src/modes/update.rs
+++ b/src/modes/update.rs
@@ -51,7 +51,7 @@ pub fn mode_update(
                 .expect("Unable to get compression engine");
             let size = compression_engine.size(item_path)? as i64;
             item.size = Some(size);
-            db::update_item(&conn, item.clone())?;
+            db::update_item(conn, item.clone())?;
         } else {
             debug!(
                 "MAIN: Unable to update size of item due to missing file {:?}",
@@ -60,7 +60,7 @@ pub fn mode_update(
         }
     }
 
-    if args.item.meta.len() > 0 {
+    if !args.item.meta.is_empty() {
         debug!("MAIN: Updating item meta");
         for kv in args.item.meta.iter() {
             let meta = db::Meta {