Performance issue: extremely slow package downloads when SERVE_DIRECT = false (Azure Blob backend)

[paowuh]

Description

Very slow package download performance when using Azure Blob Storage backend (1–2 MB/s vs 12–13 MB/s)

Description

We are experiencing significantly degraded download performance when using Azure Blob Storage as the backend for Gitea Packages (Generic Packages) on Gitea 1.25.2.

When Gitea streams package data (SERVE_DIRECT = false), download throughput drops to 1–2 MB/s.

However:

• Downloading the same blob directly from Azure Blob Storage reaches 12–13 MB/s.
• Another artifact repository we operate (Nexus Repository PRO) running in exactly the same VM and network conditions achieves 9–10 MB/s.

---

Environment

• Gitea version: 1.25.2 (Linux binary release)
• OS: Rocky Linux 9
• Reverse proxy: NGINX (also tested by bypassing → same result)
• VM environment:
  • Hosted in our on-prem datacenter (VMware)
  • No bandwidth limitations
  • The same VM runs Nexus Repository PRO with 9–10 MB/s download performance
• Storage backend: Azure Blob Storage
• Network: Low-latency, high-bandwidth link to Azure region (direct download achieves 12–13 MB/s)

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Configuration

[packages]
ENABLED = true
STORAGE_TYPE = azureblob
SERVE_DIRECT = false   # Required for correct filename handling

[packages.azureblob]
ENDPOINT = https://<account>.blob.core.windows.net/
ACCOUNT_NAME = <account>
ACCOUNT_KEY = <key>
CONTAINER = <container>
PATH = packages


### Gitea Version

1.25.2

### Can you reproduce the bug on the Gitea demo site?

No

### Log Gist

_No response_

### Screenshots

_No response_

### Git Version

_No response_

### Operating System

Rocky Linux 9.7

### How are you running Gitea?

We are running Gitea using the official binary release of version 1.25.2, downloaded from the Gitea website.

Gitea is executed as a systemd service on a dedicated virtual machine running:

Rocky Linux 9 (minimal installation)

Hosted on our on-premises VMware datacenter

No bandwidth limitations applied at the hypervisor or network level

The systemd service launches the Gitea binary directly from:

/srv/gitea/bin/gitea web --config /srv/gitea/data/conf/app.ini


We are not using Docker or any third-party packaging.

### Database

PostgreSQL