Check an array against another with performance

by

I got an initial array, I am checking against another array to find how many objects have at least one instance of the Domain in data.

This works but it performs very poorly when there is a lot of data.

const data = [
  {
    Domain: 'google.com',
    '# Reocurring Domains': 0
  },
  {
    Domain: 'apple.com',
    '# Reocurring Domains': 0
  },
  {
    Domain: 'facebook.com',
    '# Reocurring Domains': 0
  }
]

const domains = [
  {
    'google.com': true,
    'microsoft.com': true,
    'google.com': true
  },
  {
    'apple.com': true,
    'microsoft.com': true,
    'twitter.com': true
  },
  {
    'facebook.com': true,
    'apple.com': true,
    'facebook.com': true
  }
]

for (const obj of data) {
  let count = 1
  for (const entry of domains) {
    if (entry[obj.Domain]) {
      obj['# Reocurring Domains'] = count++
    }
  }
}

console.log(data)

In there any way to this with a more performant approach?

Thanks.

26 thoughts on “Check an array against another with performance”

Leave a Comment