Based on size the fastest computer is

currently Fugaku, a supercomputer developed by RIKEN and Fujitsu in Japan. Fugaku has a size of 47.6 racks and occupies an area of 1,640 square meters. It is capable of performing 442 petaflops, making it the fastest computer in the world as of now.

As of October 2021, the fastest supercomputer in terms of size is Fugaku, a supercomputer developed by RIKEN and Fujitsu in Japan. Fugaku is located in the RIKEN Center for Computational Science in Kobe, Japan. It achieved the top spot on the current TOP500 list, which ranks supercomputers based on their performance on the Linpack benchmark. Fugaku's processing power is approximately 442 petaflops (quadrillions of calculations per second). The supercomputer is built using ARM architecture and consists of 158,976 nodes, each powered by Fujitsu's A64FX CPU.

To determine the fastest computer based on size, you would need to consider several factors, such as processing power, memory capacity, and storage capacity. The size of a computer alone does not determine its speed. However, we can discuss some categories of computers known for their speed and compact sizes.

1. Supercomputers: Supercomputers are designed to perform complex calculations at an extremely high speed. They are typically large in size and housed in dedicated facilities. To find the fastest supercomputer, you can refer to the TOP500 list, which ranks supercomputers based on their performance on the Linpack benchmark.

2. Gaming PCs: Gaming computers are built with powerful components that can deliver high-speed performance. Small form factor gaming PCs, such as Mini-ITX or Micro-ATX builds, provide a compact size while still offering impressive processing power. The speed of a gaming PC depends on the specifications, including the CPU, graphics card, and RAM.

3. Workstations: Workstations are powerful computers designed for professionals who require high-performance capabilities for tasks such as video editing, 3D rendering, and scientific simulations. Compact workstations, such as those based on the Intel NUC or HP Z2 Mini models, offer a smaller footprint without compromising processing power.

4. Laptops: Some high-end laptops are known for their exceptional speed and portability. Look for laptops with cutting-edge processors, ample RAM, and solid-state drives (SSDs) for faster data access. Brands like Apple, Dell, HP, and Lenovo offer powerful laptop models that can rival desktop computers in terms of speed.

To determine the absolute fastest computer based on size, you would need to consider specific benchmarks and compare models within each category. Additionally, advances in technology are constantly pushing the boundaries of speed, so it's essential to keep up with the latest releases and performance reviews.