JAR size affect the response time of lambda?

Question

Hi,  
I'm making some experiments regarding the impact of JAR size on Lambda Cold Starts and response times. I have created 3 JARs of different sizes.

| JAR Size | Response time|
| --- | --- |
| 10mb| 1s|
| 64mb| 6s|
| 100mb| 12s|  
In Cludwatch logs I can see that init durations for all these Lambas is on average ~620ms, but for every lambda the response time is different and I don't know why. The code is the same(there is no logic -> all of them are returning a String), differences in size are due to different maven dependencies that I added. All of them are from AWS SDK. 
Is this normal?

Answer

Yes. the size of function package can affect the cold start time. You can refer this blog (https://aws.amazon.com/ko/blogs/compute/operating-lambda-performance-optimization-part-2/)

JAR Size	Response time
10mb	1s
64mb	6s
100mb	12s
In Cludwatch logs I can see that init durations for all these Lambas is on average ~620ms, but for every lambda the response time is different and I don't know why. The code is the same(there is no logic -> all of them are returning a String), differences in size are due to different maven dependencies that I added. All of them are from AWS SDK.
Is this normal?

JAR size affect the response time of lambda?

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