Software bloat is a process whereby successive versions of a computer program become perceptibly slower, use more memory, disk space or processing power, or have higher hardware requirements than the previous version, while making only dubious user-perceptible improvements or suffering from feature creep. The term is not applied consistently; it is often used as a pejorative by end users (bloatware) to describe undesired user interface changes even if those changes had little or no effect on the hardware requirements. In long-lived software, perceived bloat can occur from the software servicing a large, diverse marketplace with many differing requirements. Most end users will feel they only need some limited subset of the available functions, and will regard the others as unnecessary bloat, even if end users with different requirements require those functions.
Actual (measurable) bloat can occur due to de-emphasising algorithmic efficiency in favour of other concerns like developer productivity, or possibly through the introduction of new layers of abstraction like a virtual machine or other scripting engine for the purposes of convenience when developer constraints are reduced. The perception of improved developer productivity, in the case of practising development within virtual machine environments, comes from the developers no longer taking resource constraints and usage into consideration during design and development; this allows the product to be completed faster but it results in increases to the end user's hardware requirements to compensate.
The term "bloatware" is also used to describe unwanted pre-installed software or bundled programs.
Code bloat
In computer programming, code bloat refers to the presence of program code (source code or machine code) that is perceived as unnecessarily long, slow, or otherwise wasteful of resources.
Software developers involved in the industry during the 1970s had severe limitations on disk space and memory. Every byte and clock cycle was taken into account, and much work went into fitting the programs into available resources.
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thumb|Logotype de Mozilla. Mozilla est une communauté développant des logiciels libres sous la direction de la Fondation Mozilla. Elle développe et publie les produits Mozilla, tous libres d'accès et respectant le Manifeste Mozilla émis en 2007 par Mitchell Baker afin d'améliorer l'internet. Les logiciels sont entre autres le navigateur internet Firefox ordinateurs et mobiles, le logiciel de courrier Thunderbird, l'OS Firefox mobile et le gestionnaire de bugs Bugzilla.
Feature creep is the excessive ongoing expansion or addition of new features in a product, especially in computer software, video games and consumer and business electronics. These extra features go beyond the basic function of the product and can result in software bloat and over-complication, rather than simple design. The definition of what qualifies as "feature creep" varies among end users, where what is perceived as such by some users may be considered practical functionality by others.
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