fix(vitest): disable optimizer by default until it's stable (#5156)

Author: sheremet-va

docs/config/index.md

@@ -159,7 +159,7 @@ You will not be able to edit your `node_modules` code for debugging, since the c
 #### deps.optimizer.{mode}.enabled
 
 - **Type:** `boolean`
-- **Default:** `true` if using >= Vite 4.3.2, `false` otherwise
+- **Default:** `false` since Vitest 1.3.0
 
 Enable dependency optimization.
 

packages/vitest/src/node/plugins/utils.ts

@@ -14,7 +14,7 @@ export function resolveOptimizerConfig(_testOptions: DepsOptimizationOptions | u
     console.warn(`Vitest: "deps.optimizer" is only available in Vite >= 4.3.2, current Vite version: ${viteVersion}`)
   else
     // enable by default
-    testOptions.enabled ??= true
+    testOptions.enabled ??= false
   if (!allowed || testOptions?.enabled !== true) {
     newConfig.cacheDir = undefined
     newConfig.optimizeDeps = {