What Tencent’s 2020 R&D Report Reveals About Code Growth and Developer Productivity

0. 2020 Tencent added 2 billion lines of code, R&D staff 68%

According to Tencent’s Q3 2020 financial report, the company had 77,592 employees, with R&D personnel accounting for 68%—a 16% increase over 2019. Developers wrote 2 billion more lines of code than the previous year, a 67% growth.

1. C++ remains the most popular language

The three most prominent languages in 2020 were C++, Go, and TypeScript. C++ tops the list, unsurprising for a game‑centric company. Notably, Go entered the Top 5 for the first time in 2019 and was the fastest‑growing language in 2020.

2. R&D efficiency gains

The report shows:

Average of 5,242 requests completed per day.

30% of requests responded within one day.

46% completed within three days.

Average bug‑resolution time shortened by 15%.

3. High‑quality code output

Technical Leaders

70% of technical leaders produced an average of 32,000 high‑quality code lines per person, 2,000 more than in 2019.

Senior Engineers

54% of engineers at level 12 or above devoted themselves to coding, each contributing over 30,000 lines.

2019 Tencent report: Tencent added 1.29 billion lines of code in 2019, the hottest language was ...