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HTTP3 Network Latency Optimization
Dropbox
Dropbox logoDropbox · Feature trail

HTTP3 Network Latency Optimization

1 post · May 2023

What this trail covers

Dropbox is actively investigating and implementing network protocol upgrades to reduce latency across its services. This includes evaluating and deploying HTTP3 to improve connection establishment and reduce head-of-line blocking, particularly benefiting users in regions with higher network latency and at higher percentiles of latency distribution. The goal is to enhance the performance of critical features like search, file operations, and content suggestions.

All Dropbox trails
  1. May 2023Investigating the impact of HTTP3 on network latency for searchThis post details an investigation into the impact of HTTP3 on network latency for Dropbox's search functionality. It describes an experiment conducted in collaboration with the Traffic team to compare HTTP2 and HTTP3 performance. The experiment involved setting up a test subdomain with a no-op API endpoint to isolate network latency. The methodology included cache warming, running parallel HTTP2 requests as a control, and then running parallel HTTP3 requests. Results showed significant latency reductions at higher percentiles (p90, p95) and for users in Asia, Europe, and North/Central America, particularly due to HTTP3's elimination of head-of-line blocking. The findings indicate that HTTP3 offers substantial benefits for users experiencing higher latencies and will inform a production rollout.
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What this trail covers

Dropbox is actively investigating and implementing network protocol upgrades to reduce latency across its services. This includes evaluating and deploying HTTP3 to improve connection establishment and reduce head-of-line blocking, particularly benefiting users in regions with higher network latency and at higher percentiles of latency distribution. The goal is to enhance the performance of critical features like search, file operations, and content suggestions.

All Dropbox trails

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