Azure Storage Performance

Key Performance Metrics

Azure Storage provides low-latency, high-throughput data access across multiple services. The following table summarizes the typical performance characteristics for each storage type.

Service	Typical Latency (ms)	Throughput (MiB/s)	Concurrency (max IOPS)
Blob (Hot)	2–5	≈ 2,000 (single blob)	≈ 20,000
Blob (Cool)	5–10	≈ 1,500	≈ 15,000
File (Standard)	3–7	≈ 1,800	≈ 10,000
Queue	1–3	≈ 500	≈ 5,000
Table	1–4	≈ 2,000	≈ 25,000

Latency vs. Payload Size

Performance Tuning Tips

Use TransferOptions with MaximumConcurrency to parallelize large uploads.
Prefer PageBlob for random I/O workloads; BlockBlob excels at sequential writes.
Enable Premium SSD for latency‑critical workloads.
Leverage Azure CDN in front of Blob storage for global low‑latency reads.
Batch small writes with AppendBlob to reduce request overhead.

Sample Code – Measuring Write Latency

using Azure.Storage.Blobs;
using System.Diagnostics;

var client = new BlobServiceClient(connectionString);
var container = client.GetBlobContainerClient("test");
await container.CreateIfNotExistsAsync();

var blob = container.GetBlobClient("sample.bin");
var data = new byte[10 * 1024 * 1024]; //10 MiB

var sw = Stopwatch.StartNew();
await blob.UploadAsync(new BinaryData(data));
sw.Stop();

Console.WriteLine($"Upload latency: {sw.ElapsedMilliseconds} ms");