diff --git a/Cargo.lock b/Cargo.lock
index 3d9bc690..9102332d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1167,6 +1167,7 @@ version = "0.2.0"
 dependencies = [
  "erased-serde",
  "lazy_static",
+ "maplit 0.1.6",
  "regex",
  "serde",
  "serde_derive",
@@ -1722,6 +1723,12 @@ dependencies = [
  "linked-hash-map",
 ]
 
+[[package]]
+name = "maplit"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22593015b8df7747861c69c28acd32589fb96c1686369f3b661d12e409d4cf65"
+
 [[package]]
 name = "maplit"
 version = "1.0.2"
@@ -2080,7 +2087,7 @@ version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "54be6e404f5317079812fc8f9f5279de376d8856929e21c184ecf6bbd692a11d"
 dependencies = [
- "maplit",
+ "maplit 1.0.2",
  "pest",
  "sha-1 0.8.2",
 ]
diff --git a/framework/Cargo.toml b/framework/Cargo.toml
index 741471db..4f8e5ca8 100644
--- a/framework/Cargo.toml
+++ b/framework/Cargo.toml
@@ -31,3 +31,5 @@ lazy_static = "1.2"
 walkdir = "2"
 
 regex = "1"
+
+maplit="0.1.6"
diff --git a/framework/src/framework_detector.rs b/framework/src/framework_detector.rs
index cd5ba68f..9073265b 100644
--- a/framework/src/framework_detector.rs
+++ b/framework/src/framework_detector.rs
@@ -1,10 +1,10 @@
 use crate::facet::{Facet, FacetsBuilder};
 use crate::lang::LangDetectors;
 use std::cell::RefCell;
-use std::collections::BTreeMap;
+use std::collections::{BTreeMap, HashSet};
 use std::path::Path;
 
-#[derive(Serialize, PartialEq, Debug, Clone, Ord, PartialOrd, Eq)]
+#[derive(Serialize, PartialEq, Debug, Clone)]
 pub struct Framework {
     pub name: String,
     pub path: String,
@@ -12,9 +12,9 @@ pub struct Framework {
     // |   languages |   files    |
     // |-------------|------------|
     // | Java        | build.gradle, settings.gradle |
-    pub files: RefCell<Vec<String>>,
+    pub files: RefCell<HashSet<String>>,
     // in JVM projects, has different languages, such as Java, Groovy, Kotlin...
-    pub languages: RefCell<Vec<String>>,
+    pub languages: RefCell<HashSet<String>>,
 }
 
 #[derive(Serialize)]
@@ -36,7 +36,6 @@ impl Frameworks {
         if !self.frameworks.borrow().contains(&framework) {
             self.associate_with_source_files(&framework);
             self.frameworks.borrow_mut().push(framework);
-            self.frameworks.borrow_mut().sort();
         }
     }
 
@@ -56,7 +55,6 @@ impl Frameworks {
     fn add_language_to_frameworks(&self, file_path: &str, language: &str) {
         for framework in self.frameworks.borrow_mut().iter() {
             if file_path.starts_with(&framework.path)
-                && !framework.languages.borrow().contains(&language.to_string())
             {
                 Frameworks::add_language_to_framework(language.to_string(), framework);
             }
@@ -64,8 +62,7 @@ impl Frameworks {
     }
 
     fn add_language_to_framework(language: String, framework: &Framework) {
-        framework.languages.borrow_mut().push(language);
-        framework.languages.borrow_mut().sort();
+        framework.languages.borrow_mut().insert(language);
     }
 
     fn cache_source_file(&self, file_path: &str, language: &str) {
@@ -84,8 +81,7 @@ impl Frameworks {
     pub fn add_settings_file(&self, framework_name: &str, file_path: &str, file_name: &str) {
         for framework in self.frameworks.borrow_mut().iter() {
             if file_path.starts_with(&framework.path) && framework.name.eq(framework_name) {
-                framework.files.borrow_mut().push(file_name.to_string());
-                framework.files.borrow_mut().sort();
+                framework.files.borrow_mut().insert(file_name.to_string());
             }
         }
     }
@@ -256,23 +252,20 @@ mod tests {
         let files = framework.files.borrow();
         let languages = framework.languages.borrow();
         assert_eq!(name, "Gradle");
-        assert_eq!(files.get(0).unwrap().as_str(), "build.gradle");
-        assert_eq!(files.get(1).unwrap().as_str(), "settings.gradle");
-        assert_eq!(languages.get(0).unwrap().as_str(), "Groovy");
-        assert_eq!(languages.get(1).unwrap().as_str(), "Java");
-        assert_eq!(languages.get(2).unwrap().as_str(), "Kotlin");
-        assert_eq!(languages.get(3).unwrap().as_str(), "Scala");
+        assert_eq!(files.contains("build.gradle"), true);
+        assert_eq!(files.contains("settings.gradle"), true);
+        assert_eq!(languages.contains("Groovy"), true);
+        assert_eq!(languages.contains("Java"), true);
+        assert_eq!(languages.contains("Kotlin"), true);
+        assert_eq!(languages.contains("Scala"), true);
 
         let framework = frameworks.get(1).unwrap();
         let name = framework.name.to_string();
         let files = framework.files.borrow();
         let languages = framework.languages.borrow();
-        for lang in languages.iter() {
-            println!("{}", lang);
-        }
         assert_eq!(name, "Maven");
-        assert_eq!(files.get(0).unwrap().as_str(), "pom.xml");
-        assert_eq!(languages.get(0).unwrap().as_str(), "Java");
-        assert_eq!(languages.get(1).unwrap().as_str(), "Kotlin");
+        assert_eq!(files.contains("pom.xml"), true);
+        assert_eq!(languages.contains("Java"), true);
+        assert_eq!(languages.contains("Kotlin"), true);
     }
 }
diff --git a/framework/src/lang/jvm.rs b/framework/src/lang/jvm.rs
index 5af964c0..f8f985e8 100644
--- a/framework/src/lang/jvm.rs
+++ b/framework/src/lang/jvm.rs
@@ -66,8 +66,8 @@ pub fn framework_analysis(entry: &DirEntry, frameworks: &Frameworks) {
         frameworks.add_framework(Framework {
             name: ident_framework_name(file_name).to_string(),
             path: entry.path().parent().unwrap().to_str().unwrap().to_string(),
-            files: RefCell::new(vec![file_name.to_string()]),
-            languages: RefCell::new(vec![]),
+            files: RefCell::new(hashset! {file_name.to_string()}),
+            languages: RefCell::new(hashset! {}),
         });
     }
 
diff --git a/framework/src/lib.rs b/framework/src/lib.rs
index da1c670b..e8fa96e7 100644
--- a/framework/src/lib.rs
+++ b/framework/src/lib.rs
@@ -3,6 +3,9 @@
 #[macro_use]
 extern crate lazy_static;
 
+#[macro_use]
+extern crate maplit;
+
 #[macro_use]
 extern crate serde_derive;
 extern crate regex;