| 1 | {
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| 2 | "version": "2026-06-09.1",
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| 3 | "modes": {
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| 4 | "git_stock": {
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| 5 | "setup": [],
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| 6 | "applies_to": [
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| 7 | "all"
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| 8 | ],
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| 9 | "compares_to_oak_modes": [
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| 10 | "oak_default",
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| 11 | "oak_virtual_branch"
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| 12 | ],
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| 13 | "fairness_note": "Baseline installed Git with no optional working-tree accelerators."
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| 14 | },
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| 15 | "git_untracked_cache": {
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| 16 | "setup": [
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| 17 | [
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| 18 | "git",
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| 19 | "update-index",
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| 20 | "--untracked-cache"
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| 21 | ]
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| 22 | ],
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| 23 | "applies_to": [
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| 24 | "large-tree",
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| 25 | "huge-tree",
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| 26 | "ignored-heavy",
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| 27 | "wide-dirty-tree"
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| 28 | ],
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| 29 | "compares_to_oak_modes": [
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| 30 | "oak_default"
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| 31 | ],
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| 32 | "fairness_note": "Valid when status cost is dominated by untracked-file discovery."
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| 33 | },
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| 34 | "git_split_index": {
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| 35 | "setup": [
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| 36 | [
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| 37 | "git",
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| 38 | "update-index",
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| 39 | "--split-index"
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| 40 | ]
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| 41 | ],
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| 42 | "applies_to": [
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| 43 | "large-tree",
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| 44 | "huge-tree",
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| 45 | "wide-dirty-tree"
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| 46 | ],
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| 47 | "compares_to_oak_modes": [
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| 48 | "oak_default"
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| 49 | ],
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| 50 | "fairness_note": "Optimizes index writes; should be reported separately from stock Git."
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| 51 | },
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| 52 | "git_fsmonitor": {
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| 53 | "setup": [
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| 54 | [
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| 55 | "git",
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| 56 | "config",
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| 57 | "core.fsmonitor",
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| 58 | "true"
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| 59 | ],
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| 60 | [
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| 61 | "git",
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| 62 | "fsmonitor--daemon",
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| 63 | "start"
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| 64 | ],
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| 65 | [
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| 66 | "git",
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| 67 | "status",
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| 68 | "--porcelain=v1"
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| 69 | ]
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| 70 | ],
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| 71 | "applies_to": [
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| 72 | "large-tree",
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| 73 | "huge-tree",
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| 74 | "wide-dirty-tree"
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| 75 | ],
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| 76 | "compares_to_oak_modes": [
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| 77 | "oak_default"
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| 78 | ],
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| 79 | "fairness_note": "Requires platform support. Mark unsupported when no fsmonitor daemon or hook is active."
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| 80 | },
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| 81 | "git_sparse_checkout": {
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| 82 | "setup": [
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| 83 | [
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| 84 | "git",
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| 85 | "sparse-checkout",
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| 86 | "init",
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| 87 | "--cone"
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| 88 | ],
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| 89 | [
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| 90 | "git",
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| 91 | "sparse-checkout",
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| 92 | "set",
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| 93 | "<fixture sparse paths>"
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| 94 | ]
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| 95 | ],
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| 96 | "applies_to": [
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| 97 | "sparse-task",
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| 98 | "large-tree",
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| 99 | "huge-tree"
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| 100 | ],
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| 101 | "compares_to_oak_modes": [
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| 102 | "oak_space_mount",
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| 103 | "oak_mount_per_task"
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| 104 | ],
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| 105 | "fairness_note": "Only valid for scenarios with explicit sparse-visible path sets."
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| 106 | },
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| 107 | "git_worktree": {
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| 108 | "setup": [
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| 109 | [
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| 110 | "git",
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| 111 | "worktree",
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| 112 | "add",
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| 113 | "<task path>",
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| 114 | "-b",
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| 115 | "<task branch>"
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| 116 | ]
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| 117 | ],
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| 118 | "applies_to": [
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| 119 | "parallel-agent",
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| 120 | "branch-per-task"
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| 121 | ],
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| 122 | "compares_to_oak_modes": [
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| 123 | "oak_space_mount",
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| 124 | "oak_virtual_branch"
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| 125 | ],
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| 126 | "fairness_note": "Measures isolation strategy, not single-checkout branch switching."
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| 127 | },
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| 128 | "git_lfs": {
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| 129 | "setup": [
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| 130 | [
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| 131 | "git",
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| 132 | "lfs",
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| 133 | "install",
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| 134 | "--local"
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| 135 | ],
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| 136 | [
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| 137 | "git",
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| 138 | "lfs",
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| 139 | "track",
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| 140 | "*.bin"
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| 141 | ]
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| 142 | ],
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| 143 | "applies_to": [
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| 144 | "single_large_binary",
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| 145 | "many_large_binaries",
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| 146 | "single_huge_binary_1gb",
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| 147 | "many_large_binaries_multigb"
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| 148 | ],
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| 149 | "compares_to_oak_modes": [
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| 150 | "oak_default",
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| 151 | "oak_space_mount"
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| 152 | ],
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| 153 | "fairness_note": "Requires Git LFS availability and fixture generation with LFS-tracked binaries."
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| 154 | },
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| 155 | "git_scalar": {
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| 156 | "setup": [
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| 157 | [
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| 158 | "git",
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| 159 | "config",
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| 160 | "core.fsmonitor",
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| 161 | "true"
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| 162 | ],
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| 163 | [
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| 164 | "git",
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| 165 | "config",
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| 166 | "core.untrackedCache",
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| 167 | "true"
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| 168 | ],
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| 169 | [
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| 170 | "git",
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| 171 | "config",
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| 172 | "core.preloadIndex",
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| 173 | "true"
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| 174 | ],
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| 175 | [
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| 176 | "git",
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| 177 | "config",
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| 178 | "index.threads",
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| 179 | "true"
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| 180 | ],
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| 181 | [
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| 182 | "git",
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| 183 | "config",
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| 184 | "index.version",
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| 185 | "4"
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| 186 | ],
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| 187 | [
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| 188 | "git",
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| 189 | "config",
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| 190 | "core.multiPackIndex",
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| 191 | "true"
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| 192 | ],
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| 193 | [
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| 194 | "git",
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| 195 | "config",
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| 196 | "core.commitGraph",
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| 197 | "true"
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| 198 | ],
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| 199 | [
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| 200 | "git",
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| 201 | "config",
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| 202 | "status.aheadBehind",
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| 203 | "false"
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| 204 | ],
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| 205 | [
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| 206 | "git",
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| 207 | "config",
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| 208 | "gc.auto",
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| 209 | "0"
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| 210 | ],
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| 211 | [
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| 212 | "git",
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| 213 | "fsmonitor--daemon",
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| 214 | "start"
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| 215 | ],
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| 216 | [
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| 217 | "git",
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| 218 | "status",
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| 219 | "--porcelain=v1",
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| 220 | "--untracked-files=all"
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| 221 | ]
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| 222 | ],
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| 223 | "applies_to": [
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| 224 | "many_small_files",
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| 225 | "wide_dirty_tree",
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| 226 | "many_small_files_50k"
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| 227 | ],
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| 228 | "compares_to_oak_modes": [
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| 229 | "oak_default"
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| 230 | ],
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| 231 | "fairness_note": "Scalar-recommended local configuration (git scalar.c set_recommended_config, local-performance keys), with the fsmonitor daemon started and the untracked cache warmed in recorded untimed setup rows. Applies to the large-tree scenarios Scalar targets; on small fixtures fsmonitor IPC makes it SLOWER than stock Git, so it is not a stronger baseline there. Oak comparisons use the strongest Git per cell (bench summary). Commit-graph/multi-pack-index files come from Scalar maintenance, not applicable to 1-3 commit core histories."
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| 232 | }
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| 233 | }
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| 234 | }
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