Firebase vs AWS vs Supabase comparison - Performance Comparison

Time Complexity: Firebase vs AWS vs Supabase comparison

O(n)

Understanding Time Complexity

When using cloud services like Firebase, AWS, or Supabase, it's important to know how the time to complete tasks grows as you add more data or users.

We want to understand how the number of operations changes when we scale up.

Scenario Under Consideration

Analyze the time complexity of fetching user data from Firebase.

const db = getFirestore();
const usersRef = collection(db, 'users');
const snapshot = await getDocs(usersRef);
snapshot.forEach(doc => {
  console.log(doc.id, '=>', doc.data());
});
    

This code fetches all user documents from the 'users' collection and processes each one.

Identify Repeating Operations

Look at what repeats when fetching and processing data.

• Primary operation: Fetching each user document from the database.
• How many times: Once per user document in the collection.

How Execution Grows With Input

As the number of users grows, the number of documents fetched and processed grows too.

Input Size (n)	Approx. Api Calls/Operations
10	10 document fetches
100	100 document fetches
1000	1000 document fetches

Pattern observation: The number of operations grows directly with the number of users.

Final Time Complexity

Time Complexity: O(n)

This means the time to fetch and process data grows in a straight line with the number of user documents.

Common Mistake

[X] Wrong: "Fetching all users is always fast no matter how many users there are."

[OK] Correct: More users mean more documents to fetch, so the time grows with the number of users.

Interview Connect

Understanding how cloud operations scale helps you design apps that stay fast as they grow. This skill shows you can think about real-world app performance.

Self-Check

What if we changed fetching all users to fetching only users with a specific property? How would the time complexity change?

Practice

1. Which platform is best suited for quickly building apps with realtime data updates and simple backend requirements?

easy

A. Firebase

B. AWS

C. Supabase

D. None of the above

Solution

1. Step 1: Understand Firebase's main strength

   Firebase is designed for fast app development with realtime database and simple backend features.

2. Step 2: Compare with AWS and Supabase

   AWS is more complex and flexible, Supabase is open-source with SQL focus, but Firebase excels in realtime simplicity.

3. Final Answer:

   Firebase -> Option A

4. Quick Check:

   Realtime + simple backend = Firebase [OK]

Hint: Realtime + simple backend = Firebase [OK]

Common Mistakes:

• Confusing AWS as fastest for simple apps
• Thinking Supabase is best for realtime simplicity
• Assuming all platforms are equally simple

2. Which of the following is a correct statement about AWS compared to Firebase and Supabase?

easy

A. AWS is only for small projects with simple backend needs.

B. AWS offers powerful and flexible cloud services for complex projects.

C. AWS is an open-source SQL backend with realtime features.

D. AWS is mainly used for mobile app development with realtime database.

Solution

1. Step 1: Identify AWS's core purpose

   AWS provides a wide range of cloud services designed for large and complex projects requiring flexibility.

2. Step 2: Eliminate incorrect options

   "AWS is only for small projects with simple backend needs." is false because AWS handles complex projects; "AWS is mainly used for mobile app development with realtime database." describes Firebase; "AWS is an open-source SQL backend with realtime features." describes Supabase.

3. Final Answer:

   AWS offers powerful and flexible cloud services for complex projects. -> Option B

4. Quick Check:

   AWS = powerful + flexible for complex projects [OK]

Hint: AWS = powerful and flexible for complex projects [OK]

Common Mistakes:

• Thinking AWS is only for simple apps
• Mixing Supabase features with AWS
• Assuming AWS is mainly for realtime mobile apps

3. Given this description: "An open-source backend with SQL database and realtime features," which platform fits best?

medium

A. Supabase

B. AWS

C. Firebase

D. Google Cloud Functions

Solution

1. Step 1: Analyze the description keywords

   Open-source, SQL backend, and realtime features point to Supabase's main characteristics.

2. Step 2: Compare with other platforms

   Firebase is not open-source and uses NoSQL; AWS is not open-source and offers many services; Google Cloud Functions is serverless compute, not a backend database.

3. Final Answer:

   Supabase -> Option A

4. Quick Check:

   Open-source + SQL + realtime = Supabase [OK]

Hint: Open-source + SQL + realtime = Supabase [OK]

Common Mistakes:

• Confusing Firebase as open-source
• Thinking AWS is open-source SQL backend
• Mixing serverless functions with backend databases

4. You want to build a complex app with many cloud services and custom infrastructure. Which mistake would cause problems if you choose Firebase instead of AWS?

medium

A. Firebase is too complex and hard to use for simple apps.

B. Firebase requires managing your own SQL database.

C. Firebase does not support realtime data updates.

D. Firebase lacks the flexibility and wide range of cloud services AWS offers.

Solution

1. Step 1: Understand Firebase's limitations

   Firebase is great for simple apps but does not offer the extensive cloud services and flexibility AWS provides.

2. Step 2: Identify the mistake

   Choosing Firebase for complex infrastructure needs leads to lack of flexibility and missing services, which AWS covers well.

3. Final Answer:

   Firebase lacks the flexibility and wide range of cloud services AWS offers. -> Option D

4. Quick Check:

   Complex app needs flexibility = AWS, not Firebase [OK]

Hint: Complex needs require AWS flexibility, not Firebase [OK]

Common Mistakes:

• Thinking Firebase is complex and hard for simple apps
• Believing Firebase lacks realtime support
• Assuming Firebase requires manual SQL management

5. You want to build a realtime app with a SQL database and prefer open-source tools. Which platform should you choose and why?

hard

A. Firebase, because it offers the best SQL support and open-source backend.

B. AWS, because it has the simplest realtime database and open-source features.

C. Supabase, because it provides an open-source SQL backend with realtime capabilities.

D. None, because no platform supports realtime SQL with open-source backend.

Solution

1. Step 1: Identify the requirements

   The app needs realtime updates, SQL database, and open-source tools.

2. Step 2: Match requirements to platforms

   Firebase is not open-source and uses NoSQL; AWS is powerful but not open-source SQL backend; Supabase fits all requirements.

3. Step 3: Confirm Supabase features

   Supabase offers open-source SQL backend with realtime features, ideal for this scenario.

4. Final Answer:

   Supabase, because it provides an open-source SQL backend with realtime capabilities. -> Option C

5. Quick Check:

   Realtime + SQL + open-source = Supabase [OK]

Hint: Realtime + SQL + open-source = Supabase [OK]

Common Mistakes:

• Choosing Firebase for SQL and open-source
• Assuming AWS is open-source SQL backend
• Believing no platform supports these features