Hussein Nasser @hnasr

Backend and Database Courses https://t.co/Qonec4YftL YouTube https://t.co/FfDg8cnVCI Author of https://t.co/PcX2tDsIxC Engineer @esri node.win California, USA Joined July 2010

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Hussein Nasser @hnasr

a day ago

Sometimes we get torn in software decisions between lazy loading vs eager loading, both has their pros and cons. But we forget that there is a third option: To not load anything at all. Do you absolutely need what you are loading? I think its a tough question Your app may…

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Hussein Nasser @hnasr

2 days ago

Announcing my Real-Time backend System Design With WebSockets Course realtime.husseinnasser.com I hope you enjoy it.

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Hussein Nasser @hnasr

3 days ago

There are two types of people. Those who you give a destination, a desired outcome and they run and get it done. And those who you need to give clear step by step instructions to get there. And they get you there. I think a company needs both.

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Hussein Nasser @hnasr

4 days ago

WebSockets, a protocol designed in 2010 perhaps earlier was optimized to keep the header size is small as possible. Which is something I like very much. Instead of using a fixed size header for the payload length, the designer used a 7bit indicator to indicate how much bytes…

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Hussein Nasser @hnasr

5 days ago

There is tremendous joy that can be extracted from breaking down technology to its fundamental first principles. At first it is blurry, confusing and filled with vague abstraction. Once understood, it is clear as day. Only then an engineer can use the technology effectively.

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Hussein Nasser @hnasr

a week ago

If you truly know what you need you will build a good product. The challenge is not to stray out of that path. Your mind will tell you to think about this, and what about that. People may need this and that. People will tell you it has been done before don’t reinvent the…

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Hussein Nasser @hnasr

a week ago

When we were children we used to freely express. As we grow up and build identity we start to impress. To impress comes with expectations and expectations leads to disappointment. Going back to free express is liberating.

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Hussein Nasser @hnasr

2 weeks ago

March 2000

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Hussein Nasser @hnasr

2 weeks ago

Troubleshooting a challenging bug can be rewarding. When you can consistently reproduce the bug you are close to understanding it. When the bug is fully understood the solution emerges. The bug is just a behavior, it just happens to be an undesirable one.

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Nik Samokhvalov @samokhvalov

2 weeks ago

Careful: before PG17, autovacuum workers couldn't consume more than 1 GiB or RAM. And autovacuum_work_mem, by default, is -1, meaning it inherits from maintenance_work_mem. And we tend to raise maintenance_work_mem to, say, '2GB' or more. And often we raise number of workers...…

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Hussein Nasser @hnasr

2 weeks ago

Understanding HTTP/1.1 and HTTP/2 will make statements like this in MDN more clear. Server sent events or SSE is essentially a request with a very long response trickling “events”. This means if this was an h1 connection, that connection will be in use. With h1 browsers limit…

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Hussein Nasser @hnasr

3 weeks ago

Bugs can level up a software engineer if they are truly sincere in arriving at the fundamental cause and thus getting over the bug for good. I can argue that bugs often inspire new fantastic products. You can find a bug so severe in a piece of software that inspires you to…

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Hussein Nasser @hnasr

3 weeks ago

New Course .. Engineering efficient and scalable backends is such an enjoyable design activity. Understanding the frontend workflows, designing the APIs, picking the right protocols and databases for the task, and determining the communication patterns—whether the workload is…

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Hussein Nasser @hnasr

3 weeks ago

Operating systems (the kernel specifically) orchestrate many processes, allow access to memory, disk, network and execute processes by scheduling them to the CPU. Sounds simple when we put it this way but this task is vast. Writing efficient programs depends on how much…

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Hussein Nasser @hnasr

3 weeks ago

A true database problem in the networking world. The BPG routers have close to 1 million rows in their routing tables. Receiving an IP packet must lookup the destination IP address, find all matching networks (apply a bitmask) , pick the lowest cost route to find the next hop…

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Hussein Nasser @hnasr

3 weeks ago

When you realize that most memory copy operations use the CPU your perspective to software engineering changes. You will begin to look at programs differently, you will see the hotspots, understand the reasoning behind senior devs pull requests, and completely comprehend…

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Hussein Nasser @hnasr

4 weeks ago

The following two SQL queries are different for the planner. select * from emp where id = 7 select * from emp where id = 9 The planner needs to parse, compile and produce a query plan for each one. using bind variables avoids query parsing. Now those two hash to the same…

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Hussein Nasser @hnasr

4 weeks ago

My favorite thing about software engineering is making it transparent. Node is one of the most popular runtimes used on backend engineering yet I feel it is the least understood. I surely ran into this way at times. I spent 7 months working on a course to demystify NodeJS…