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Inappropriate coding practices - Performance


Within the code there are unsafe statements using a lot of machine resources, which affects the performance and response time of the application. Early Java API classes, such as Vector, Hashtable and StringBuffer, were synchronized to make them thread-safe. Unfortunately, synchronization has a major negative impact on performance, even when using these collections from a single thread.


Make requests to the system that may affect process performance and response times, since the system does not make use of the most optimal components and libraries.


Use the libraries that allow to execute the functions of concatenation and storage in collections in an optimized way (ArrayList and StringBuilder or SyncronizedList).


Anonymous user with access to the application.

Expected Remediation Time

⌚ minutes.


Default score using CVSS 3.1. It may change depending on the context of the src.


  • Attack vector: N
  • Attack complexity: H
  • Privileges required: L
  • User interaction: N
  • Scope: U
  • Confidentiality: N
  • Integrity: N
  • Availability: L


  • Exploit code madurity: P
  • Remediation level: O
  • Report confidence: X


  • Vector string: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:X
  • Score:
    • Base: 3.1
    • Temporal: 2.8
  • Severity:
    • Base: Low
    • Temporal: Low

Compliant code

The application uses efficient methods to prevent consuming extra resources in the machine

class Main {
public static void main(User user) {
private userPost = new Post(user.newPost);

Non compliant code

The application uses an inefficient method to store user posts that could consume many computer resources

class Main {
public static void main(User user) {
StringBuffer str = new StringBuffer(user.posts);



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