are astro pages built parallaly or sequentially?

[lethal nest]

does the astro build command build the pages in parallel or in sequence?

[round quest]

Hi @lethal nest. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

---

Astro builds pages sequentially by default.

The config option build.concurrency controls how many pages are built in parallel. Its default is 1, meaning pages are rendered one at a time unless you explicitly increase this value in your astro.config.* file. [build.concurrency]

So:

• astro build by default builds pages in sequence.
• You can opt into limited parallelism by setting, for example:

// astro.config.mjs
export default {
  build: {
    concurrency: 2, // build up to 2 pages in parallel
  },
};

Again, the docs recommend not changing this in most cases. [build.concurrency]

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