diff --git a/src/Bundle.js b/src/Bundle.js
index 8bc5826..4130909 100644
--- a/src/Bundle.js
+++ b/src/Bundle.js
@@ -73,9 +73,8 @@ export default class Bundle {
 					declaration.use();
 				});
 
-				this.modules.forEach( module => {
-					module.markAllSideEffects();
-				});
+				// mark statements that should appear in the bundle
+				this.modules.forEach( module => module.markStatements() );
 
 				this.orderedModules = this.sort();
 				this.deconflict();
diff --git a/src/Module.js b/src/Module.js
index b21b37d..b777ea6 100644
--- a/src/Module.js
+++ b/src/Module.js
@@ -244,6 +244,7 @@ export default class Module {
 			const dependency = this.bundle.moduleById[ id ];
 
 			if ( !dependency.isExternal ) {
+				// TODO this is a weird data structure
 				weakDependencies[ dependency.id ] = dependency;
 			}
 		});
@@ -254,23 +255,6 @@ export default class Module {
 			}
 		});
 
-		// // identify strong dependencies to break ties in case of cycles
-		// this.statements.forEach( statement => {
-		// 	statement.references.forEach( reference => {
-		// 		const declaration = reference.declaration;
-		//
-		// 		if ( declaration && declaration.statement ) {
-		// 			const module = declaration.statement.module;
-		// 			if ( module === this ) return;
-		//
-		// 			// TODO disregard function declarations
-		// 			if ( reference.isImmediatelyUsed ) {
-		// 				strongDependencies[ module.id ] = module;
-		// 			}
-		// 		}
-		// 	});
-		// });
-
 		return { strongDependencies, weakDependencies };
 	}
 
@@ -294,15 +278,10 @@ export default class Module {
 		return keys( exports );
 	}
 
-	markAllSideEffects () {
-		// console.group( this.id )
-
+	markStatements () {
 		this.statements.forEach( statement => {
 			statement.secondPass( this.strongDependencies );
 		});
-
-		// console.log( this.strongDependencies.map(m=>m.id) )
-		// console.groupEnd()
 	}
 
 	namespace () {
diff --git a/src/Statement.js b/src/Statement.js
index fe5c7b7..00e0fcc 100644
--- a/src/Statement.js
+++ b/src/Statement.js
@@ -157,26 +157,12 @@ export default class Statement {
 	}
 
 	secondPass ( strongDependencies ) {
-		// console.group( 'second pass: %s', this.toString() )
-		// console.log( 'this.isIncluded', this.isIncluded )
-		// console.log( 'this.isImportDeclaration', this.isImportDeclaration )
-		// console.log( 'this.isFunctionDeclaration', this.isFunctionDeclaration )
-
-		if ( this.didSecondPassAlready || this.isImportDeclaration || this.isFunctionDeclaration ) {
-			// console.log( '>>> skipping' )
-			// console.groupEnd()
-			return;
-		}
-
-		this.didSecondPassAlready = true;
+		if ( this.isImportDeclaration || this.isFunctionDeclaration ) return;
 
 		if ( testForSideEffects( this.node, this.scope, this, strongDependencies ) ) {
 			this.mark();
-			// console.groupEnd()
 			return true;
 		}
-
-		// console.groupEnd()
 	}
 
 	source () {
diff --git a/src/ast/isFunctionDeclaration.js b/src/ast/isFunctionDeclaration.js
index 02af498..a1573e7 100644
--- a/src/ast/isFunctionDeclaration.js
+++ b/src/ast/isFunctionDeclaration.js
@@ -1,6 +1,6 @@
 export default function isFunctionDeclaration ( node ) {
 	if ( !node ) return false;
-	
+
 	return node.type === 'FunctionDeclaration' ||
 		( node.type === 'VariableDeclaration' && node.init && /FunctionExpression/.test( node.init.type ) );
 }