Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
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Re: Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
#2It’s interesting that the author chose to use SHA256 hashing for the CPU intensive workload.
Given they run on hardware acceleration using AES NI, I wonder how generally applicable it is.
Still interesting either way though, especially since there were reports of earlier Graviton (pre v3) instances having mediocre AES NI performance.
Re: Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
#3Would be interesting to add a cold start + "import boto3" benchmark for Python as importing boto3 takes forever on lambdas with little memory. For this scenario I only know this benchmark but it is from 2021 https://github.com/MauriceBrg/aws-blog.de-projects/tree/mast...
Re: Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
#4> Node.js: Node.js 22 on arm64 was consistently faster than Node.js 20 on x86_64. There's essentially a “free” ~15-20% speedup just by switching architectures!
Not sure why this is phrased like that in the TL;DR, when ARM64 is just strictly faster when running the same nodejs workload and version.
Re: Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
#5Can someone tell me why there isn't almost any laptop with Linux and ARM? Is it more efficient than x86 though
Re: Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
#6Can someone tell me why there isn't almost any laptop with Linux and ARM? Is it more efficient than x86 though
Software/driver compatibility and rational fear of change from users.
(My work laptop is one of the few ARM laptops: Thinkpad T14s with Quallcomm Snapdragon Elite)
Re: Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
#7Can someone tell me why there isn't almost any laptop with Linux and ARM? Is it more efficient than x86 though
Chromebooks are essentially this, but not that great for local development.
Re: Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
#8One of the easiest hack to reduce your AWS bills is to migrate from x86 to arm64 CPU. Performance difference is negligible, and cost can be upto 50% lower for arm machines. This is for both RDS and general compute (EC2, ECS). Would recommend to all.
Re: Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
#9What I don't get is why is it that Node is dog slow. Seriously it seems borderline unusable.
In terms of perf, Node has a pretty snappy JIT, and seems to perform OK in the browser, but this seems like something's not right here.
~200ms requests even in the light case are on the very brink of barely acceptable.
On the other hand, Python performs very well, but it's alarming to see it gets slower in every release by a significant margin.