{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:XOJYYTI5KCWYI5NSDYMBRSMXQF","short_pith_number":"pith:XOJYYTI5","canonical_record":{"source":{"id":"2201.09268","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2022-01-23T13:57:00Z","cross_cats_sorted":[],"title_canon_sha256":"c69ef09637372b8e5a635e243e0ee5f7da9a6cf2037b58dd95f1f7fcb0deb8d6","abstract_canon_sha256":"7bd18d588ba14a8ee543763191be9db07d3283d95b00a3f39f45f7f62dfb9dc6"},"schema_version":"1.0"},"canonical_sha256":"bb938c4d1d50ad8475b21e1818c997816b1715db4f369e398d20b97dc2b41f05","source":{"kind":"arxiv","id":"2201.09268","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.09268","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"arxiv_version","alias_value":"2201.09268v1","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.09268","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"pith_short_12","alias_value":"XOJYYTI5KCWY","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"pith_short_16","alias_value":"XOJYYTI5KCWYI5NS","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"pith_short_8","alias_value":"XOJYYTI5","created_at":"2026-07-05T03:50:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:XOJYYTI5KCWYI5NSDYMBRSMXQF","target":"record","payload":{"canonical_record":{"source":{"id":"2201.09268","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2022-01-23T13:57:00Z","cross_cats_sorted":[],"title_canon_sha256":"c69ef09637372b8e5a635e243e0ee5f7da9a6cf2037b58dd95f1f7fcb0deb8d6","abstract_canon_sha256":"7bd18d588ba14a8ee543763191be9db07d3283d95b00a3f39f45f7f62dfb9dc6"},"schema_version":"1.0"},"canonical_sha256":"bb938c4d1d50ad8475b21e1818c997816b1715db4f369e398d20b97dc2b41f05","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:50:55.844699Z","signature_b64":"YwgHrwPxFL3fc7jetnprLwkA8heMEdW0njxepAyJLVnobnBGj3m7J3z4tlfHq8NcIV+3TBRyT5iOnkztvTKTAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bb938c4d1d50ad8475b21e1818c997816b1715db4f369e398d20b97dc2b41f05","last_reissued_at":"2026-07-05T03:50:55.844288Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:50:55.844288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2201.09268","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:50:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mqeiLVGHazz/2cxqf8nEttQSE8R93wxgReSOojdtQdLPqqYjcqS96H2lRaHrcMrWIFi9/Y4GqXZOp1lVOQMECw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:09:02.288400Z"},"content_sha256":"3f88c39a2a1fffb7da7418aa6470b771e4a063cb1420b79305a202ae05563641","schema_version":"1.0","event_id":"sha256:3f88c39a2a1fffb7da7418aa6470b771e4a063cb1420b79305a202ae05563641"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:XOJYYTI5KCWYI5NSDYMBRSMXQF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-level Just-in-Time Compilation with One Interpreter and One Engine","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.PL","authors_text":"Carl Friedrich Bolz-Tereick, Hidehiko Masuhara, Yusuke Izawa","submitted_at":"2022-01-23T13:57:00Z","abstract_excerpt":"Modern, powerful virtual machines such as those running Java or JavaScript support multi-tier JIT compilation and optimization features to achieve their high performance. However, implementing and maintaining several compilers/optimizers that interact with each other requires hard-working VM developers. In this paper, we propose a technique to realize two-level JIT compilation in RPython without implementing several interpreters or compilers from scratch. As a preliminary realization, we created adaptive RPython, which performs both baseline JIT compilation based on threaded code and tracing J"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.09268","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2201.09268/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:50:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZvIbPj5ugdHzQYRRWLz2oRtCXJgixkF/VfSvdCr75/cy9NsVoJERey0J/Uvoec8AWnqQXKSJH139q8FcaJZpDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:09:02.289018Z"},"content_sha256":"d6ad29401bd10fa002912cf548798f4d62a1968c127d0386608f3b7af10425c6","schema_version":"1.0","event_id":"sha256:d6ad29401bd10fa002912cf548798f4d62a1968c127d0386608f3b7af10425c6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XOJYYTI5KCWYI5NSDYMBRSMXQF/bundle.json","state_url":"https://pith.science/pith/XOJYYTI5KCWYI5NSDYMBRSMXQF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XOJYYTI5KCWYI5NSDYMBRSMXQF/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-03T18:09:02Z","links":{"resolver":"https://pith.science/pith/XOJYYTI5KCWYI5NSDYMBRSMXQF","bundle":"https://pith.science/pith/XOJYYTI5KCWYI5NSDYMBRSMXQF/bundle.json","state":"https://pith.science/pith/XOJYYTI5KCWYI5NSDYMBRSMXQF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XOJYYTI5KCWYI5NSDYMBRSMXQF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:XOJYYTI5KCWYI5NSDYMBRSMXQF","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"7bd18d588ba14a8ee543763191be9db07d3283d95b00a3f39f45f7f62dfb9dc6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2022-01-23T13:57:00Z","title_canon_sha256":"c69ef09637372b8e5a635e243e0ee5f7da9a6cf2037b58dd95f1f7fcb0deb8d6"},"schema_version":"1.0","source":{"id":"2201.09268","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.09268","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"arxiv_version","alias_value":"2201.09268v1","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.09268","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"pith_short_12","alias_value":"XOJYYTI5KCWY","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"pith_short_16","alias_value":"XOJYYTI5KCWYI5NS","created_at":"2026-07-05T03:50:55Z"},{"alias_kind":"pith_short_8","alias_value":"XOJYYTI5","created_at":"2026-07-05T03:50:55Z"}],"graph_snapshots":[{"event_id":"sha256:d6ad29401bd10fa002912cf548798f4d62a1968c127d0386608f3b7af10425c6","target":"graph","created_at":"2026-07-05T03:50:55Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2201.09268/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Modern, powerful virtual machines such as those running Java or JavaScript support multi-tier JIT compilation and optimization features to achieve their high performance. However, implementing and maintaining several compilers/optimizers that interact with each other requires hard-working VM developers. In this paper, we propose a technique to realize two-level JIT compilation in RPython without implementing several interpreters or compilers from scratch. As a preliminary realization, we created adaptive RPython, which performs both baseline JIT compilation based on threaded code and tracing J","authors_text":"Carl Friedrich Bolz-Tereick, Hidehiko Masuhara, Yusuke Izawa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2022-01-23T13:57:00Z","title":"Two-level Just-in-Time Compilation with One Interpreter and One Engine"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.09268","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:3f88c39a2a1fffb7da7418aa6470b771e4a063cb1420b79305a202ae05563641","target":"record","created_at":"2026-07-05T03:50:55Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"7bd18d588ba14a8ee543763191be9db07d3283d95b00a3f39f45f7f62dfb9dc6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2022-01-23T13:57:00Z","title_canon_sha256":"c69ef09637372b8e5a635e243e0ee5f7da9a6cf2037b58dd95f1f7fcb0deb8d6"},"schema_version":"1.0","source":{"id":"2201.09268","kind":"arxiv","version":1}},"canonical_sha256":"bb938c4d1d50ad8475b21e1818c997816b1715db4f369e398d20b97dc2b41f05","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb938c4d1d50ad8475b21e1818c997816b1715db4f369e398d20b97dc2b41f05","first_computed_at":"2026-07-05T03:50:55.844288Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:50:55.844288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YwgHrwPxFL3fc7jetnprLwkA8heMEdW0njxepAyJLVnobnBGj3m7J3z4tlfHq8NcIV+3TBRyT5iOnkztvTKTAg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:50:55.844699Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.09268","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3f88c39a2a1fffb7da7418aa6470b771e4a063cb1420b79305a202ae05563641","sha256:d6ad29401bd10fa002912cf548798f4d62a1968c127d0386608f3b7af10425c6"],"state_sha256":"1bc818d8d2444d7bdc7d244120dd5aba6cd5835edc36ad8b40369303f1aad57b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w88ejmC14fEfJWaVfiC9762KiqneIsJiN3Q8hFK7BDITQCpbLxZPEuJEENkQDicn8dmr8SMS8k8Pyu1OCU86DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T18:09:02.294458Z","bundle_sha256":"250778e456c41eed5ac0a257a8dc396e15803ba03ba44eab4669040b49061a9b"}}