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Revamping Code Completion: A Smarter Approach

Improving code completion with context and curriculum training for better programming.

Hitesh Sagtani, Rishabh Mehrotra, Beyang Liu

― 6 min read


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Table of Contents

In the world of programming, speed and accuracy matter. When developers write code, they want helpful tools that can suggest what to write next. One such tool is Code Completion software, which tries to predict what a programmer is going to type. But sometimes, these tools fall short. This article explores a new approach to making code completion better using two key ideas: Context and Curriculum Learning.

What is Code Completion?

Code completion is a feature in many coding environments that helps developers write code faster. When a programmer starts writing a line, the completion tool gives suggestions for what they might want to type next. This is especially useful when writing long or complex pieces of code, where a small mistake can lead to big headaches.

The Challenge of Code Completion

While code completion tools are handy, they face a significant challenge known as Latency. This refers to the time delay between when a programmer types and when the tool offers a suggestion. If the delay is too long-over 500 milliseconds-programmers may decide to keep typing instead of waiting for the tool to catch up. This can make the earlier suggestion useless.

The main issue is that these tools need to look at both what has already been typed (prefix) and what is likely to come after it (suffix). This is where things can get complicated, especially when dealing with tricky code structures.

The Need for Improvement

Research shows that some code completion models struggle with complex code structures, leaving them unable to provide helpful suggestions. Smaller language models, which are typically faster and used for real-time coding assistance, often have a harder time compared to larger models.

Learning from Mistakes

To make these models smarter, we need to understand where they commonly fail. By identifying patterns where suggestions often miss the mark, we can create better Training data. This is where curriculum learning comes in.

Curriculum learning is like teaching kids: start with the basics and gradually introduce more difficult topics. In coding, this means training models on easier examples first before moving on to tougher ones. By doing so, these models can learn and improve their suggestions over time.

Introducing Context and Curriculum

To enhance the effectiveness of code completion, we incorporate both context and curriculum examples into the training of coding models.

Enhancing with Context

Context here refers to the additional information about the code that can help make better suggestions. For example, if the model knows what a certain function does or what variables are available, it can make more relevant recommendations.

By gathering relevant context from coding projects, we can provide models with more specific information while training. This context helps them understand dependencies and relationships within the code, resulting in smarter suggestions.

Creating a Curriculum

To set up an effective curriculum, we gather tough examples from existing code and teach models using these scenarios. By focusing on code patterns that frequently trip up the models, we help them learn from their mistakes. This includes extracting challenging code snippets from various programming projects to ensure the models get a well-rounded education.

How It Works: Training the Models

The process of improving code completion models can be broken down into a few critical steps:

  1. Collecting Data: We gather various examples of code, both easy and complex, from real-world programming projects. This is done using tools to parse code and identify critical patterns.

  2. Filtering Out the Noise: Not all code is useful for training. We filter out poorly written or irrelevant examples, focusing instead on high-quality code snippets.

  3. Creating Contextual Recommendations: By identifying function and variable definitions, we enrich our training data with context that helps models understand the code better.

  4. Training the Models: With a well-organized mixture of challenging examples and relevant context, we begin training our models. This training adjusts their parameters so they can better predict what code should come next.

  5. Evaluating Performance: After training, we put our models to the test. We look for improvements in accuracy and latency to see how well they perform when making suggestions.

The Results

The results from integrating context and curriculum learning into code completion models have been promising. Here’s what we found:

Improvement in Performance

After using context and curriculum-based training, most models showed better accuracy in their predictions. They made more correct suggestions and, importantly, did so more quickly. Smaller models, which usually lagged behind their larger counterparts, experienced the most significant gains.

Keeping Latency Low

One of the critical findings is that these improvements in accuracy did not come at the expense of speed. The models were able to show better suggestions without increasing the wait time for programmers. This balance is essential because developers need instant feedback while coding.

Real-World Testing

To ensure the improvements were not just theoretical, we tested these models in real-world coding scenarios. Through A/B testing, we compared the performance of the new models against older versions. The results were clear: the new models offered better suggestions, and users accepted these suggestions more often.

The Future of Code Completion

The advancements discussed offer a glimpse into the future of coding assistance tools. By focusing on context and learning from challenging code examples, we can create smarter systems that genuinely help developers.

Ongoing Research

Our work is far from finished. We want to investigate further into metrics that provide deeper insights into how models perform in real coding environments. We also plan to explore ways to automate the identification of code complexity, maximizing learning opportunities for these models.

Ethical Considerations

As we improve these tools, we must also consider their ethical implications. For instance, while better code suggestions can enhance productivity, there’s a risk that the technology could be used to generate harmful or malicious code. Thus, it’s crucial to implement measures that ensure safe and responsible use of improved coding tools.

Conclusion

As developers look for ways to code more efficiently, enhanced code completion tools can make a real difference. By utilizing context and curriculum-based learning, we can significantly improve the accuracy and speed of code suggestions. This advancement not only boosts programmer productivity but also helps make coding a more enjoyable experience.

So, here’s to a future where code suggestions are as smart as the average goldfish-albeit a very well-trained goldfish! The combination of intelligent suggestions, fast responses, and user-friendly experiences makes for a delightful coding environment.

Original Source

Title: Improving FIM Code Completions via Context & Curriculum Based Learning

Abstract: Fill-in-the-Middle (FIM) models play a vital role in code completion tasks, leveraging both prefix and suffix context to provide more accurate and contextually relevant suggestions. This paper presents approaches to improve FIM code completion while addressing the challenge of maintaining low latency for real-time coding assistance. We enhance FIM code completion by incorporating context and curriculum examples in the training process. We identify patterns where completion suggestions fail more frequently, revealing complexities that smaller language models struggle with. To address these challenges, we develop a curriculum dataset by extracting hard-to-complete patterns from code repositories and generate context examples using semantic and static analysis tools (e.g. TSC compiler). We fine-tune various sized models, including StarCoder and DeepSeek, on this enhanced dataset. Our evaluation encompasses three key dimensions: the Santa Coder FIM task, the Amazon CCEval benchmark, and a new Multi-Line Infilling evaluation benchmark derived from SWE-bench. Comprehensive ablation studies across multiple model sizes reveal that while all fine-tuned models show improvements, the performance gains are more pronounced for smaller parameter models and incorporating difficult-to-complete examples, as part of curriculum learning, improves the code completion performance. This finding is particularly significant given the latency constraints of code completion tasks. While larger models like GPT and Claude perform well in multi-line completions but are prohibitively challenging to use given high latency, and our fine-tuned models achieve a balance between performance and latency. Finally, we validate our approach through online A/B testing, demonstrating tangible improvements in Completion Acceptance Rate (CAR) and Completion Persistence Rate (CPR), with zero latency impact.

Authors: Hitesh Sagtani, Rishabh Mehrotra, Beyang Liu

Last Update: Dec 21, 2024

Language: English

Source URL: https://arxiv.org/abs/2412.16589

Source PDF: https://arxiv.org/pdf/2412.16589

Licence: https://creativecommons.org/licenses/by/4.0/

Changes: This summary was created with assistance from AI and may have inaccuracies. For accurate information, please refer to the original source documents linked here.

Thank you to arxiv for use of its open access interoperability.

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