Inside Tencent’s 2021 R&D Report: Coding Trends, AI Advances & Innovation

What programming language do Tencent developers love? How many lines of code are submitted daily, and how long does bug fixing take? The 2021 Tencent R&D Big Data Report provides answers.

The report, produced by Tencent’s Technical Committee, reveals comprehensive data on R&D investment, efficiency, open‑source collaboration, and technology philanthropy in 2021.

R&D staff grew 41% year‑over‑year, with over 6,000 new projects and 3.2 billion new code lines (60% increase).

Tencent’s daily code submissions reached 120,000, with 7,453 daily requirements, and bug‑resolution time improved dramatically (average bug fix time down 42%).

Key technology investments include the domestic OS TencentOS (over ten years) and the distributed cloud OS “AoChi”, supporting 100,000‑scale servers and millions of containers.

In databases, Tencent Cloud’s solutions now support 10 PB storage and over 100 million QPS per machine; the TDSQL financial‑grade engine has been adopted by more than 20 financial institutions.

Audio‑video codecs developed by Tencent hold over 100 new international patents and won first place in multiple tracks of the 2021 MSU video codec competition.

Frontier technologies such as chips, AI, robotics, and big data saw substantial progress.

Go became the most popular language in 2021, surpassing C++.

Since 2006, Tencent has built an enterprise‑level agile R&D ecosystem including TAPD, Gongfeng code management, and the CI platform BlueShield.

Code review activity reached 2.15 million reviews (55% YoY growth), with a 75% participation rate and 8.74 comments per KLOC.

Continuous delivery saw 2.6 million weekly builds, producing 3.5 TB per project and saving 123,000 hours of compile time.

Open‑source contributions expanded with over 72,000 new internal repositories and more than 140 external projects on GitHub, involving over 3,000 contributors and earning over 400 k stars.

Tencent’s “Rhino Bird” open‑source talent program has engaged over 3,000 students from 420 universities.

Technology philanthropy includes over 30 projects such as senior‑friendly tech, volunteer services, and wildlife protection, with nearly 3,000 engineers participating.

In 2021, Tencent launched a carbon‑neutral plan, aiming for full operational and supply‑chain carbon neutrality by 2030 and 100% green electricity.

For the full report, click “Read Original”.