Why did PostgreSQL 17 outperform MongoDB 8.0 in analytical benchmarks?

In tests involving one million rows, PostgreSQL 17 handled complex analytical aggregations nearly three times faster than MongoDB 8.0. This performance gap is largely due to PostgreSQL’s sophisticated cost-based query planner, which is designed to manage complex relationships and joins with high efficiency. While MongoDB’s aggregation pipelines have improved, they often struggle with operations that span multiple entities because the engine was originally optimized for single-record isolation rather than complex relational stitching.

How do the two databases handle updates to JSON data differently?

The two systems use different storage mechanics that impact performance during write-heavy workloads. PostgreSQL uses Multi-Version Concurrency Control (MVCC), which creates a new version of an entire row even when only a small field within a JSONB document is updated, leading to "write amplification" and increased CPU usage. In contrast, MongoDB’s WiredTiger engine can often modify specific fields within a BSON document without rewriting the entire record, resulting in steadier throughput and more predictable latency during sustained update stress tests.

What is the "hybrid model" recommended for modern web applications?

The hybrid model involves using PostgreSQL to store core entities in strict relational columns while using the JSONB data type for flexible metadata or variable attributes. This approach allows developers to benefit from relational integrity and ACID transactions for critical data, like user IDs and emails, while maintaining the "escape hatch" of document flexibility for parts of the data that may change frequently. This strategy was highlighted as a way to avoid "schema regret," where a purely flexible database becomes a disorganized collection of inconsistent records.

When is MongoDB a better choice than PostgreSQL for scaling?

MongoDB is considered a "horizontal scaling specialist" because it was built with native sharding as a core feature, making it easier to distribute data across multiple machines or geographic regions. This makes it a superior choice for apps dealing with hundreds of terabytes of data or high-volume IoT telemetry. While PostgreSQL can scale vertically with more RAM and faster drives, or horizontally through specific extensions and managed services, MongoDB’s built-in ability to handle massive write-heavy volumes across clusters remains its primary architectural advantage.

PostgreSQL vs MongoDB: Which is better for web apps?

22 分钟

2026年4月1日

Technology Business Education

Choosing a database shouldn't be based on vibes. We compare speed and JSONB flexibility to help you pick the right engine for your next application.

PostgreSQL vs MongoDB: Which is better for web apps?最佳语录

The 2026 verdict is that Postgres has essentially consumed the document-store use case for 90% of web apps. It is the boring, reliable, and shockingly fast choice that survives every trend.

此音频课程由 BeFreed 社区成员创建

输入问题

How Postgres and Mongo DB differ and how they are the same. What solution is better for web apps?

主持声音

Jackson

学习风格

深度

知识来源

Getting Real: The smarter, faster, easier way to build a successful web application

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"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

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"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

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"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

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"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

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PostgreSQL vs MongoDB: Which is better for web apps?

22 分钟

2026年4月1日

Technology Business Education

Choosing a database shouldn't be based on vibes. We compare speed and JSONB flexibility to help you pick the right engine for your next application.

PostgreSQL vs MongoDB: Which is better for web apps?最佳语录

The 2026 verdict is that Postgres has essentially consumed the document-store use case for 90% of web apps. It is the boring, reliable, and shockingly fast choice that survives every trend.

核心要点

The Great Database Performance Showdown

0:00

Imagine staring at a monitoring dashboard painted entirely red because your database hit a performance cliff during a simple reporting task. Many developers choose MongoDB for its "vibes-based" flexibility, but as of 2026, the gap has collapsed. In a test of one million rows, PostgreSQL 17 handles complex analytical aggregations nearly three times faster than MongoDB 8.0. While Mongo still wins on bulk document inserts, Postgres now bridges the gap with its JSONB type, giving you relational integrity and document flexibility in one engine. We’re breaking down which side of the 1M ops test your web app falls on.

The Architecture of Your Choice

The Reality of Update-Heavy Pressure

Indexing the Unknown

The Myth of Total Flexibility

Transactions and the Integrity Gap

Scaling Beyond the Single Machine

The Cost of the Managed Cloud

A Practical Playbook for the Modern Developer

Reflection on the Path Forward

此音频课程由 BeFreed 社区成员创建

输入问题

How Postgres and Mongo DB differ and how they are the same. What solution is better for web apps?

主持声音

Jackson

学习风格

深度

知识来源

常见问题

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"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

由哥伦比亚大学校友在旧金山创建

BeFreed 汇聚了全球超过 1,000,000 求知若渴的学习者

查看更多网络上关于 BeFreed 的讨论

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

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