I try https://github.com/dotnet/dotnet-docker-samples to build image and pull image to Azure Container Registry.

If select Hosted VS2017, build time over 10 minutes, this is vsts log:

2018-03-30T01:22:42.2743752Z Step 1/10 : FROM microsoft/aspnetcore-build:2.0 AS build-env
2018-03-30T01:22:42.6374873Z 2.0: Pulling from microsoft/aspnetcore-build
2018-03-30T01:22:43.0531986Z bce2fbc256ea: Already exists
2018-03-30T01:22:43.4117294Z 5b557cd80a98: Pulling fs layer
...
2018-03-30T01:30:41.9959572Z 8dad97602968: Pull complete
2018-03-30T01:30:42.0385788Z Digest: sha256:618d25f23747bd42d7fe023e539b4559094cc9f7bba96954580fa6625c6b028f

2018-03-30T01:32:07.4462745Z Step 7/10 : FROM microsoft/aspnetcore:2.0
2018-03-30T01:32:07.7902423Z 2.0: Pulling from microsoft/aspnetcore
2018-03-30T01:32:08.0599967Z bce2fbc256ea: Already exists
...
2018-03-30T01:32:32.9847515Z 87497ddb3941: Pull complete
2018-03-30T01:32:33.0253745Z Digest: sha256:d4270777fe6896c184e9c360503aa6549bdce3d8dd4d6341912f51d64d8b563c
2018-03-30T01:32:33.0464779Z Status: Downloaded newer image for microsoft/aspnetcore:2.0

If select Hosted Linux Preview, build time just less 3 minutes, this is vsts log:

2018-03-29T08:17:17.6035358Z Step 1/10 : FROM microsoft/aspnetcore-build:2.0 AS build-env
2018-03-29T08:17:18.4086313Z 2.0: Pulling from microsoft/aspnetcore-build
2018-03-29T08:17:18.4110719Z c73ab1c6897b: Pulling fs layer
...
2018-03-29T08:18:44.9769131Z ddf742436635: Pull complete
2018-03-29T08:18:44.9957385Z Digest: sha256:618d25f23747bd42d7fe023e539b4559094cc9f7bba96954580fa6625c6b028f
2018-03-29T08:18:45.0102608Z Status: Downloaded newer image for microsoft/aspnetcore-build:2.0

2018-03-29T08:19:08.8897217Z Step 7/10 : FROM microsoft/aspnetcore:2.0
2018-03-29T08:19:09.2285268Z 2.0: Pulling from microsoft/aspnetcore
2018-03-29T08:19:09.3515742Z c73ab1c6897b: Already exists
...
2018-03-29T08:19:15.8911940Z 165bc9810346: Pull complete
2018-03-29T08:19:15.9125766Z Digest: sha256:d4270777fe6896c184e9c360503aa6549bdce3d8dd4d6341912f51d64d8b563c
2018-03-29T08:19:15.9267818Z Status: Downloaded newer image for microsoft/aspnetcore:2.0

Why is the Hosted VS2017 download speed so much worse?

Developer Community

Hosted VS2017 docker pull speed is much worse