# Should we profile CIDs?

**URL:** <https://discuss.ipfs.tech/t/should-we-profile-cids/18507>\
**Category:** Protocol\
**Created:** [September 16, 2024, 9:07am UTC](https://discuss.ipfs.tech/t/should-we-profile-cids/18507 "2024-09-16T09:07:36Z")\
**Posts on this page:** 1\
**Showing post:** 41

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**Author:** ![SethDocherty](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ipfs.tech/sethdocherty/32/8408_2.png) [@SethDocherty](https://discuss.ipfs.tech/u/SethDocherty)\
**Post date:** [June 27, 2025, 12:49am UTC](https://discuss.ipfs.tech/t/should-we-profile-cids/18507/41 "2025-06-27T00:49:13Z")

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@danieln, after conducting some testing on my end using [test-cid-v1-wide](https://github.com/ipfs/kubo/blob/master/docs/config.md#test-cid-v1-wide-profile), I’m observing a difference in CIDs when a file exceeds 1024 MB.

```auto
✅ MATCH for file: file_0_5MB (CID: bafkreie6drn3hggb3ruptdvqlahec5grhjv5m4it3sjvsm7m74us5kbofe)
✅ MATCH for file: file_1023MB (CID: bafybeigggqgfyhwr6okpc2w2v32tu7qczcurpj6j4hii6f4gxjmuot2kci)
✅ MATCH for file: file_1024MB (CID: bafybeih6ciohqseh6blceg35litzlib5we4nqudkeafbp54uu3zh7ld26a)
❌ MISMATCH for file: file_1025MB
   IPFS CID: bafybeignp2eaklnbejnlcrxaldpiuoc63tk63vdsokleegajxpvczzxiau
   Singularity CID: bafybeia2jsxebrhwuehoptuhpmhmlxhot74nalyihzud2uufosptoakjyu

✅ MATCH for file: file_173MB (CID: bafybeibvtg6kjfyibyej47xr32bg357uh2xffelgricuxziqasdhiyp5ke)
✅ MATCH for file: file_174MB (CID: bafybeig66jfwvfifkpzodebqook26gxcvhlvkqsak35rgvxm2izbob65oy)
✅ MATCH for file: file_175MB (CID: bafybeigwbdeibl3jcugnicgahiqjvdd6f4vyk5sip4ryepk25rll5zi3l4)
✅ MATCH for file: file_1MB (CID: bafkreibksrll5wy37k5z5roemmzciocovqgi4k742a6yz75lpmsgpfukrm)

```

I tried experimenting with some of the other [import](https://github.com/ipfs/kubo/blob/master/docs/config.md#import) options for the `ipfs add` command, but that didn’t seem to resolve the issue.

I created a [Docker image](https://hub.docker.com/r/sethdd/cid-comparison) that you can use to recreate it on your end.

> The [sample data generation configuration profile](https://github.com/easierdata/Singularity/blob/main/Utilities/cid-comparison/config/dataset_config.json) I used was `dataset1`, so feel free to remove the others for a quicker turnaround test.

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_[View the full topic](https://discuss.ipfs.tech/t/should-we-profile-cids/18507)._