diff --git a/Cargo.toml b/Cargo.toml
index a8faf087..593091cc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,14 +21,13 @@ num-traits = "0.2.11"
 [features]
 #default = ["no_function", "no_index", "no_float", "only_i32", "no_stdlib", "unchecked", "no_optimize"]
 default = []
-debug_msgs = []     # print debug messages on function registrations and calls
 unchecked = []      # unchecked arithmetic
 no_stdlib = []      # no standard library of utility functions
 no_index = []       # no arrays and indexing
 no_float = []       # no floating-point
 no_function = []    # no script-defined functions
 no_optimize = []    # no script optimizer
-optimize_full = []  # set optimization level to Full (default is Simple) - this is a feature used only to simply testing
+optimize_full = []  # set optimization level to Full (default is Simple) - this is a feature used only to simplify testing
 only_i32 = []       # set INT=i32 (useful for 32-bit systems)
 only_i64 = []       # set INT=i64 (default) and disable support for all other integer types
 
diff --git a/README.md b/README.md
index 98bca82a..9b50bf3f 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,6 @@ Optional features
 
 | Feature       | Description                                                                                                                                              |
 | ------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `debug_msgs`  | Print debug messages to stdout related to function registrations and calls.                                                                              |
 | `no_stdlib`   | Exclude the standard library of utility functions in the build, and only include the minimum necessary functionalities. Standard types are not affected. |
 | `unchecked`   | Exclude arithmetic checking (such as overflows and division by zero). Beware that a bad script may panic the entire system!                              |
 | `no_function` | Disable script-defined functions if not needed.                                                                                                          |
diff --git a/src/api.rs b/src/api.rs
index 1bdf34e0..ad12218f 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -29,20 +29,6 @@ impl<'e> Engine<'e> {
         args: Option<Vec<TypeId>>,
         f: Box<FnAny>,
     ) {
-        debug_println!(
-            "Register function: {} with {}",
-            fn_name,
-            if let Some(a) = &args {
-                format!(
-                    "{} parameter{}",
-                    a.len(),
-                    if a.len() > 1 { "s" } else { "" }
-                )
-            } else {
-                "no parameter".to_string()
-            }
-        );
-
         let spec = FnSpec {
             name: fn_name.to_string().into(),
             args,
diff --git a/src/call.rs b/src/call.rs
index 5c06e8a9..cf7356fe 100644
--- a/src/call.rs
+++ b/src/call.rs
@@ -3,11 +3,12 @@
 #![allow(non_snake_case)]
 
 use crate::any::{Any, Dynamic};
-use crate::stdlib::{string::String, vec, vec::Vec};
 
 #[cfg(not(feature = "no_index"))]
 use crate::engine::Array;
 
+use crate::stdlib::{string::String, vec, vec::Vec};
+
 /// Trait that represent arguments to a function call.
 pub trait FuncArgs {
     /// Convert to a `Vec` of `Dynamic` arguments.
diff --git a/src/engine.rs b/src/engine.rs
index 5985108f..0689dbb5 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -165,16 +165,6 @@ impl Engine<'_> {
         def_val: Option<&Dynamic>,
         pos: Position,
     ) -> Result<Dynamic, EvalAltResult> {
-        debug_println!(
-            "Calling function: {} ({})",
-            fn_name,
-            args.iter()
-                .map(|x| (*x).type_name())
-                .map(|name| self.map_type_name(name))
-                .collect::<Vec<_>>()
-                .join(", ")
-        );
-
         // First search in script-defined functions (can override built-in)
         if let Ok(n) = self
             .script_functions
diff --git a/src/error.rs b/src/error.rs
index 59816e96..87e2e2d5 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,6 +1,7 @@
 //! Module containing error definitions for the parsing process.
 
 use crate::parser::Position;
+
 use crate::stdlib::{char, error::Error, fmt, string::String};
 
 /// Error when tokenizing the script text.
diff --git a/src/fn_register.rs b/src/fn_register.rs
index 065dac0f..53c646a0 100644
--- a/src/fn_register.rs
+++ b/src/fn_register.rs
@@ -6,6 +6,7 @@ use crate::any::{Any, Dynamic};
 use crate::engine::{Engine, FnCallArgs};
 use crate::parser::Position;
 use crate::result::EvalAltResult;
+
 use crate::stdlib::{any::TypeId, boxed::Box, string::ToString, vec};
 
 /// A trait to register custom functions with the `Engine`.
diff --git a/src/lib.rs b/src/lib.rs
index 67190112..5293982c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -43,30 +43,6 @@
 #[cfg(feature = "no_std")]
 extern crate alloc;
 
-// needs to be here, because order matters for macros
-macro_rules! debug_println {
-    () => (
-        #[cfg(feature = "debug_msgs")]
-        {
-            print!("\n");
-        }
-    );
-    ($fmt:expr) => (
-        #[cfg(feature = "debug_msgs")]
-        {
-            print!(concat!($fmt, "\n"));
-        }
-    );
-    ($fmt:expr, $($arg:tt)*) => (
-        #[cfg(feature = "debug_msgs")]
-        {
-            print!(concat!($fmt, "\n"), $($arg)*);
-        }
-    );
-}
-
-#[macro_use]
-mod stdlib;
 mod any;
 mod api;
 mod builtin;
@@ -78,6 +54,7 @@ mod optimize;
 mod parser;
 mod result;
 mod scope;
+mod stdlib;
 
 pub use any::{Any, AnyExt, Dynamic, Variant};
 pub use call::FuncArgs;