Overall, aggregate performance on the TOP500 rose to 749 petaflops, a 32 percent jump from a year ago.

Such an increase, though, is well below the list's historical growth rate of about 185 percent per year, said the organizers.

"The slower growth in list performance is a trend that began in 2013, and has shown no signs of reversal," they said.

When it comes to companies making these systems, the US-based Hewlett-Packard Enterprise claims the number one spot with 143 supercomputers. China's Lenovo is the second most popular vendor, with 88 systems, and Cray is in third place, with 57.

There are three other Chinese companies in the vendor list: Sugon (No. 4 with 44 systems), Inspur (No. 6 with 20 systems) and Huawei (No. 7 with 19 systems).

The Top500 list is considered one of the most authoritative rankings of the world's supercomputers. It is compiled on the basis of the machines' performance on the Linpack benchmark by experts from the United States and Germany.