Change, similarity and redundancy in software systems

软件系统中的变化、相似性和冗余

• 批准号: 386505-2010
• 负责人: Roy, ChanchalKumar
• 金额: $ 1.46万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=550463
• 关键词: Change; similarity; redundancy; software; systems

Studies show that up to 80% of software development cost is spent on software maintenance. One aspect of software maintenance is dealing with duplicated code. Copy-and-paste of code sections with or without minor changes is a common software development practice, and over time large software systems develop many such "software clones". While such cloning is often intentional and can be useful in many ways, it can cause significant problems in the maintenance of large software systems because it increases the risk of update anomalies, increases program size and complexity, and contributes to high maintenance costs. Clone detection is thus an important problem in software maintenance research, and serves as the basis of a wide range of software engineering tasks. In the last several years, we have significantly advanced the state-of-the-art in the detection and analysis of near-miss software clones, those where minor additions, deletions and modifications have been made in the copied fragments.

研究表明，高达80%的软件开发成本花费在软件维护上。软件维护的一方面是处理重复代码。复制和粘贴代码部分（无论是否有细微更改）是一种常见的软件开发实践，随着时间的推移，大型软件系统会开发出许多此类“软件克隆”。虽然这种克隆通常是有意的并且在很多方面都很有用，但它可能会在大型软件系统的维护中引起严重问题，因为它增加了更新异常的风险，增加了程序大小和复杂性，并导致高昂的维护成本。因此，克隆检测是软件维护研究中的一个重要问题，并且是广泛的软件工程任务的基础。在过去的几年中，我们在检测和分析几乎未命中的软件克隆方面取得了显着的进步，这些克隆在复制的片段中进行了少量的添加、删除和修改。