# Why is mean\_sweep\_response so slow

**URL:** <https://community.brain-map.org/t/why-is-mean-sweep-response-so-slow/2076>\
**Category:** General\
**Created:** [January 8, 2023, 8:52am UTC](https://community.brain-map.org/t/why-is-mean-sweep-response-so-slow/2076 "2023-01-08T08:52:49Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![zeyuyun1](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.brain-map.org/zeyuyun1/32/756_2.png) [@zeyuyun1](https://community.brain-map.org/u/zeyuyun1)\
**Post date:** [January 8, 2023, 8:52am UTC](https://community.brain-map.org/t/why-is-mean-sweep-response-so-slow/2076/1 "2023-01-08T08:52:49Z")

</div>

Hi guys. I’m pretty new to Allen Brain Map. I’m currently just trying the tutorial for SDK right now. However, it seems like it take forever to get population response:

```auto
from pathlib import Path
from allensdk.brain_observatory.natural_scenes import NaturalScenes
output_dir = '.'
from allensdk.core.brain_observatory_cache import BrainObservatoryCache
boc = BrainObservatoryCache(
    manifest_file=str(Path(output_dir) / 'brain_observatory_manifest.json'))
dataset = boc.get_ophys_experiment_data(541206592)
ns = NaturalScenes(dataset)
rp=ns.mean_sweep_response.copy()

```

The last line is taking forever. Is this normal?