C logstore:\sopenReadOnly\sscans\sheader-only;\sverified_on_open\sis\sgone\n\nThe\sspeedup\sreaches\sproduction.\sopenReadOnly\sis\sthe\spath\severy\sCLI\sverb\ntakes\s--\sRepository.open\sfalls\sback\sto\sit,\sand\sRepository.logStore,\sthe\ncontent\schannel\sbehind\scat,\sartifact,\scheckout\sand\ssync,\scalls\sit\swith\sno\ncache\sin\sfront.\sIt\sscanned\severy\spayload\sbyte\son\severy\sinvocation:\n\n\s\s10k\sframes\s\s42\sMB\s\s\s\s42.2ms\s->\s10.3ms\n\s\s10k\sframes\s410\sMB\s\s\s298.0ms\s->\s12.3ms\n\s\s100k\sframes\s416\sMB\s\s511.9ms\s->\s115.4ms\n\s\s100\sframes\s419\sMB\s\s\s321.4ms\s->\s\s0.10ms\n\nOpen\scost\sis\snow\sa\sfunction\sof\sframe\scount,\snot\srepository\ssize.\n\nverified_on_open\swas\sthe\sflag\sopenReadOnly\sset\sto\stell\sreadFrameAt\sthat\nthe\sscan\shad\salready\schecked\severy\sframe,\sso\sreads\scould\sskip\stheir\sown\ncrc.\sWith\sno\sscan\sdoing\sthat,\sthe\sexemption\shad\snothing\sleft\sto\srest\son\nand\sthe\sflag\sis\sdeleted.\sreadFrameAt\snow\scrc-checks\sunconditionally:\sit\sis\nthe\sonly\sthing\sstanding\sbetween\sa\srotted\spayload\sand\sa\scaller\sthat\nbelieves\sit,\sand\srestoring\sany\sskip\sthere\smeans\srestoring\sthe\sscan.\n\nDetection\sis\srelocated,\snot\sremoved.\sA\spayload\sbitflip\sno\slonger\svoids\sthe\nopen\s--\sthe\srest\sof\sthe\srepository\sstays\susable\s--\sand\ssurfaces\sthe\sfirst\ntime\sanyone\sreads\sthose\sbytes:\s\sand\s\sboth\srefuse\nwith\s'repository\sis\scorrupt',\sand\s\snames\sthe\sartifact\sand\sthe\noffset.\sThat\sverb\sshipped\sfirst\sfor\sexactly\sthis\sreason.\n\nopenForVerify\sis\sdeleted.\sIt\sexisted\sbecause\sopenReadOnly\sboth\saborted\son\na\sdamaged\sstore\sand\sgranted\sread-time\strust,\sneither\sof\swhich\sverify\scould\naccept;\sboth\sproperties\sare\sgone,\sit\sbecame\sbyte-identical\sto\nopenReadOnly,\sand\sits\sown\sdoc\scomment\ssaid\sto\sremove\sit\sin\sthis\scommit.\n\nThe\sDST\sprove-it-can-fail\sarm\sis\sinverted\srather\sthan\sdeleted.\sIt\sasserted\nthat\sopenReadOnly\sWOULD\sserve\slatent\srot\ssilently,\sacross\sa\sseed\srange\nwhere\sat\sleast\sone\scorpus\slands\sa\spayload\srot\son\sa\sraw\sframe\swhose\sheader\nsurvived.\sThat\shazard\sis\sgone,\sso\sthe\ssame\srange\snow\sasserts\sthe\sopposite:\nthe\sread\spath\snever\sserves\srot\sas\ssuccess.\strust_on_read\sgoes\swith\sit\s--\nthere\sare\sno\slonger\stwo\spaths\sto\sselect\sbetween.\sLosing\sthe\seager\swhole-log\nscan\scost\snothing\shere,\sbecause\sper-read\sverification\sis\swhat\swas\scatching\nthis\sall\salong.\n\nNet\s-40\slines.\n\nVerified:\sfmt\sclean,\stest\s2327/2327,\sgate,\se2e\s671/671,\sdst\s6\sseeds\sx\s1000\nsteps.\sThe\sSlice\s1\stripwire\s--\sthe\sassertion\sthat\sopenReadOnly\sstill\nrejected\seagerly,\swritten\sto\sfail\sif\sthe\sflag\swas\sdeleted\swithout\san\sfsck\nverb\s--\sfired\son\sthis\scommit,\swhich\sis\sthe\sone\sit\swas\saimed\sat.
D 2026-07-31T21:12:22.080
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F src/repoview.zig b3eb611496da8f970fe1be46499474c5922e0161106483c3d360b3e2ad9a696d
F src/rfc_vectors/artifact_a1_1_sha1_manifest.txt 82d8fc78b3fbf85efe80cb05e79db40c910bf0551e55b728c6f9c2ca7a42ddb6
F src/rfc_vectors/artifact_a1_2_sha3_technote.txt 832e850f83aab2e2a754aa97591109f7f05fb41e4126c7e71c88a59d6d17e55d
F src/rfc_vectors/artifact_a3_rcard_manifest.txt 47e412ef211f095e93275fadf527909e581eef42357d8437fc7e299bfc3e62a7
F src/rfc_vectors/sync_a1_round1_reply.txt 638813029b10f81303b88859279afb17095d7c779c993f4267870909acabbeb9
F src/rfc_vectors/sync_a1_round2_file_cards.txt 4fa397741f7521cc4181d5d6b04dc143187f57602384eaa688552115ecda27c2
F src/rfc_vectors/sync_a1_round2_reply.txt af956808190c79b37a384041690c36b78845b471d6c6c01d1cced6e3ee92e6b1
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F src/root.zig b41df35dd82536fd998b3c220589265a8cc5498449b3f27a8fe83e3e27f33ac0
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F src/sim/checkout_sweep.zig 80bb6fef67c88a29a2b6bdc372996c9f2c4ad65db289cddebc7a427b42ee5d39
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F src/sim/oracle.zig bc9e272bb3332b7b715fbcc254b63583aa294b769d423f4be48593152717dfb2
F src/sim/shun_sweep.zig 8b7b2a106a9eaaeb4d041ec0faa061d51a8c2a866f8fcae5d245f814085b063d
F src/sim/storage_sweep.zig fa6de11a0cc9260f779d1dd139aafd817b11b3e01b8a3c823a1d5d1b9ee14956
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F src/sync.zig b7f4efb71164052c62461104853ef04520b92cb244f2f2ab53884b0d0e132709
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F src/sync_fuzz.zig 0ab9b7195535468db561cdcb405b7bf17536e2c6cb77a115ab1fe2badb001194
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F src/tidy.zig c43465f253553b13e4b68f1c4e5eee3ec7638e2cd7ed8b4ce8dab4445bfb89d3
F src/transport.zig 36c4cbabaf10b30dbc20c6b8a30df94394a7e0a65b27613f0ace2f49ec1eaa79
F src/transport_fuzz.zig 43c310c51a6502fb2e049e6f43dfa151b1a632e6c885554ec6edce4ec62a8a48
F src/undo.zig c3ef95e4c6affeb893e60922506b760f483a6640fe3fd5c63bf86c6d20cf2675
F src/update.zig 743e89fa2a007ca980f23a55f26d14befe3635d387458a2b58b67edfa03ab65c
F src/update_test.zig c92b790daa737a1ba0b983c613de734d17028399fc303a8fd69298c3bc5325a1
F src/warmread_benchmark.zig 290887ab34f7777effcd4062c000456b1fcf8a59f84617a96a740d15a0245776
P 90bd1b8015311c13ab246ed5c4fd474d2a2fac6705cdde2b10688d788be55826
R 56ee2277ac631739b9bd67700ae5bec6
T *branch * logstore-slice2
T *sym-logstore-slice2 *
T -sym-trunk *
U dmestas
Z 9a0695d007083d3fcc9adc66cbabe3a9