# CPU Transcoding Benchmarks

**URL:** <https://forum.livepeer.org/t/cpu-transcoding-benchmarks/1436>\
**Category:** Transcoders\
**Created:** [July 27, 2021, 3:52am UTC](https://forum.livepeer.org/t/cpu-transcoding-benchmarks/1436 "2021-07-27T03:52:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![papa\_bear](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.livepeer.org/papa_bear/32/1259_2.png) [@papa\_bear](https://forum.livepeer.org/u/papa_bear)\
**Post date:** [July 27, 2021, 3:52am UTC](https://forum.livepeer.org/t/cpu-transcoding-benchmarks/1436/1 "2021-07-27T03:52:14Z")

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Howdy y’all-

NicoV asked me to start a topic here on the forum about CPU transcoding in Livepool that originally came up on Discord. Since I have a few transcoders successfully running in the pool running CPU clients I ran the Livepeer benchmark on a couple of them to see how real world performance compared to the benchmark results. Below is summary of the initial results.

i9 9900K 8 Core @ 3.6GHz  
1 Session

- Real-Time Duration Ratio \* | 0.5223  
2 Sessions
- Real-Time Duration Ratio \* | 0.5761  
3 Sessions
- Real-Time Duration Ratio \* | 0.6324

Snippet from a Livepool log transcoding a single concurrent stream  
12:48.093280 14620 ot\_rpc.go:183] Transcoding done for taskId=158054 url=https://143.110.211.203:8935/stream/5c6d14b8/10690.tempfile dur=1.0139934s err=  
I0725 15:12:48.172289 14620 ot\_rpc.go:237] Transcoding done results sent for taskId=158054 url=https://143.110.211.203:8935/stream/5c6d14b8/10690.tempfile dur=79.0091ms err=\<nil`

i7 1165G7 4 Core @ 2.8GHz (Mobile)  
1 Session

- Real-Time Duration Ratio \* | 0.7332

I0725 15:19:06.186837 19744 ot\_rpc.go:183] Transcoding done for taskId=159371 url=https://143.110.211.203:8935/stream/0d94cf07/2407.tempfile dur=1.4070058s err=  
I0725 15:19:06.266061 19744 ot\_rpc.go:237] Transcoding done results sent for taskId=159371 url=https://143.110.211.203:8935/stream/0d94cf07/2407.tempfile dur=78.7ms err=

Makalore ran the following benchmark  
AMD Ryzen 7 3700X 8-Core Processor  
1 Session

- Real-Time Duration Ratio \* | 0.5488

I noticed that real world performance appeared better than the benchmark results and hypothesized that the streams I received in the pool were not multi resolution transcodes like the default settings in the benchmark tool so I ran the i7 with just the 480p setting from the default .json profile.

Here are the results of that test.

i7 1165G7 4 Core @ 2.8GHz (Mobile)  
Single resolution 480p  
1 Session

- Real-Time Duration Ratio \* | 0.3045  
2 Sessions
- Real-Time Duration Ratio \* | 0.3453  
3 Sessions
- Real-Time Duration Ratio \* | 0.3912

This is preliminary data and I plan to run more benchmarks with different configurations in the future. I think it would be interesting if we can get more people to test a variety of CPUs and see how they compare. If there is interest in this topic it would probably be a good idea if we come up with a standardized method and set of config files to run the benchmarks and keep an updated spreadsheet with the results.