---
title: Optimization
description: Improve c15t startup performance with prefetching and network tuning.
lastModified: 2026-03-17
---
## 1) Prefer Same-Origin Proxy
Proxy c15t requests through your app server so the browser calls your own origin instead of a third-party domain.
```ts
const store = createConsentManagerStore({
mode: 'hosted',
backendURL: '/api/c15t', // same-origin proxy path
});
```
## 2) Prefetch Init Data Early
Use `buildPrefetchScript()` to start the `/init` request as early as possible — before your app JavaScript loads.
Add the prefetch script to your HTML ``:
```ts
import { buildPrefetchScript } from 'c15t';
const script = buildPrefetchScript({
backendURL: '/api/c15t',
});
// Inject `script` into a