Blackfire Profiler has been actively developed since March 2015 where its architecture is based a PHP extension called Probe, and a server-side daemon called Agent which resulted it being used by some popular PHP projects such as ownCloud, Drupal, Symfony, and Laravel (created by Taylor Otwell and is made available via an MIT License).
Blackfire Profiler is a tool that instruments PHP applications to gather data about consumed server resources like memory, CPU time, and I/O operations. Blackfire is also a SaaS service to visualize any callgrind-compatible profile. Its architecture is based on a Probe, which is a PHP extension that gathers the raw performance profiles and an Agent, which is a server-side daemon that aggregates and forwards profiles to blackfire.io servers to visualize them. Blackfire has been used by some popular PHP projects such as ownCloud, Drupal, Symfony and Laravel to improve their performance and to spot performance bottlenecks. As of March 2015 Blackfire is actively developed. In computer engineering, computer architecture is a set of rules and methods that describe the functionality, organization, and implementation of computer systems. Some definitions of architecture define it as describing the capabilities and programming model of a computer but not a particular implementation. In other definitions computer architecture involves instruction set architecture design, microarchitecture design, logic design, and implementation. Systems design: includes all of the other hardware components within a computing system, such as data processing other than the CPU (e.g., direct memory access), virtualization, and multiprocessing In multitasking computer operating systems, a daemon (/dimn/ or /demn/) is a computer program that runs as a background process, rather than being under the direct control of an interactive user. Traditionally, the process names of a daemon end with the letter d, for clarification that the process is in fact a daemon, and for differentiation between a daemon and a normal computer program. For example, syslogd is a daemon that implements system logging facility, and sshd is a daemon that serves incoming SSH connections. PHP is a general-purpose scripting language especially suited to web development. PHP originally stood for Personal Home Page, but it now stands for the recursive initialism PHP: Hypertext Preprocessor. Laravel (stylised as Laavel) is a free, open-source PHP web framework, created by Taylor Otwell and intended for the development of web applications following the modelviewcontroller (MVC) architectural pattern and based on Symfony. The source code of Laravel is hosted on GitHub and licensed under the terms of MIT License. 
