Pith Number

pith:PMQWENJX

pith:2026:PMQWENJXMFMA2C2IGDQPTDTAZI

not attested not anchored not stored refs pending

PerfAgent: Profiler-Guided Iterative Refinement for Repository-Level Code Optimization

Bastian Lipka, Jatin Ganhotra, Ryan Deng, Tim Kaler, Xuhao Chen, Yao Ma, Yuanzhe Liu

arxiv:2607.19653 v1 · 2026-07-22 · cs.SE · cs.AI

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PMQWENJXMFMA2C2IGDQPTDTAZI}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-23T00:24:02.079135Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b2162353761580d0b4830e0f98e60ca00f338adf102ea6914218056fa9d534e

Aliases

arxiv: 2607.19653 · arxiv_version: 2607.19653v1 · doi: 10.48550/arxiv.2607.19653 · pith_short_12: PMQWENJXMFMA · pith_short_16: PMQWENJXMFMA2C2I · pith_short_8: PMQWENJX

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/PMQWENJXMFMA2C2IGDQPTDTAZI \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 7b2162353761580d0b4830e0f98e60ca00f338adf102ea6914218056fa9d534e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26c9f2bbcf47aaa5798a484fadc0c2995920deb68a17c012e59f6ae915953764",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2026-07-22T01:19:42Z",
    "title_canon_sha256": "2346251241469906c6c7953f81e12eda17c6fd516b8ebc0e500285bc61f60301"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.19653",
    "kind": "arxiv",
    "version": 1
  }
}