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Performance issues and optimizations in JavaScript: an empirical study

Selakovic, Marija ; Pradel, Michael (2016)
Performance issues and optimizations in JavaScript: an empirical study.
38th International Conference on Software Engineering. Austin, Texas (14.-22.05.2016)
doi: 10.1145/2884781.2884829
Conference or Workshop Item, Bibliographie

Abstract

As JavaScript is becoming increasingly popular, the performance of JavaScript programs is crucial to ensure the responsiveness and energy-efficiency of thousands of programs. Yet, little is known about performance issues that developers face in practice and they address these issues. This paper presents an empirical study of 98 fixed performance issues from 16 popular client-side and server-side JavaScript projects. We identify eight root causes of issues and show that inefficient usage of APIs is the most prevalent root cause. Furthermore, we find that most issues are addressed by optimizations that modify only a few lines of code, without significantly affecting the complexity of the source code. By studying the performance impact of optimizations on several versions of the SpiderMonkey and V8 engines, we find that only 42.68% of all optimizations improve performance consistently across all versions of both engines. Finally, we observe that many optimizations are instances of patterns applicable across projects, as evidenced by 139 previously unknown optimization opportunities that we find based on the patterns identified during the study. The results of the study help application developers to avoid common mistakes, researchers to develop performance-related techniques that address relevant problems, and engine developers to address prevalent bottleneck patterns.

Item Type: Conference or Workshop Item
Erschienen: 2016
Creators: Selakovic, Marija ; Pradel, Michael
Type of entry: Bibliographie
Title: Performance issues and optimizations in JavaScript: an empirical study
Language: English
Date: 14 May 2016
Publisher: ACM
Issue Number: 38
Book Title: ICSE '16 Proceedings of the 38th International Conference on Software Engineering
Event Title: 38th International Conference on Software Engineering
Event Location: Austin, Texas
Event Dates: 14.-22.05.2016
DOI: 10.1145/2884781.2884829
Abstract:

As JavaScript is becoming increasingly popular, the performance of JavaScript programs is crucial to ensure the responsiveness and energy-efficiency of thousands of programs. Yet, little is known about performance issues that developers face in practice and they address these issues. This paper presents an empirical study of 98 fixed performance issues from 16 popular client-side and server-side JavaScript projects. We identify eight root causes of issues and show that inefficient usage of APIs is the most prevalent root cause. Furthermore, we find that most issues are addressed by optimizations that modify only a few lines of code, without significantly affecting the complexity of the source code. By studying the performance impact of optimizations on several versions of the SpiderMonkey and V8 engines, we find that only 42.68% of all optimizations improve performance consistently across all versions of both engines. Finally, we observe that many optimizations are instances of patterns applicable across projects, as evidenced by 139 previously unknown optimization opportunities that we find based on the patterns identified during the study. The results of the study help application developers to avoid common mistakes, researchers to develop performance-related techniques that address relevant problems, and engine developers to address prevalent bottleneck patterns.

Uncontrolled Keywords: Java, software performance evaluation, API, JavaScript performance, JavaScript programs, SpiderMonkey, V8 engines, Computer bugs, Computer science, Engines, Libraries Optimization, Reliability, Servers, Empirical study, JavaScript, Optimization, Performance issue
Identification Number: TUD-CS-2016-14765
Divisions: Profile Areas
Profile Areas > Cybersecurity (CYSEC)
Date Deposited: 10 Aug 2017 16:43
Last Modified: 24 Aug 2023 10:25
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