perf(schema): use parallel promises

[GalacticHypernova]

🔗 Linked issue

#24734

❓ Type of change

• 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Following the linked PR, @pi0 brought to my attention that we can use parallel promises, and indeed the benchmark shows a significant ~30% improvement in performance, so all credits of this PR are to him.

async function main(){
async function get(name:string){
    return 42;
  }
  console.time("current")
  for (let index = 0; index < 1000000; index++) {
   const a = await get('a')
   const b = await get('b')
   const c = await get('c')
   const d = await get('d')
    
  }
console.timeEnd("current")
console.time("PR")
for (let index = 0; index < 1000000; index++) {
    const [a,b,c,d]=await Promise.all([get('a'), get('b'), get('c'), get('d')])
    
  }
  console.timeEnd("PR")
}
main()

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

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[GalacticHypernova]

Marking as draft while I'm checking to see if anything else can be parallelized

[GalacticHypernova]

Pretty sure that's everything.
I will try to fix the issues.

[GalacticHypernova]

I still don't quite get why the tests are failing, I don't see any "unexpected token"...
Unless I'm missing something of course, which is possible.

[GalacticHypernova]

Ah I see, looking back at it. I could've sworn without parentheses was fine when I tested but I probably mistook it for something, my bad