---
title: "bench-main — Mova code model"
description: "Mova code model of tools/bench/src/main.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/tools/bench/src/main.rs.groupant/"
---
Elamur: [Mova](https://md.mova.elamur.ai/free/en/) · [Dictionary](https://md.dictionary.elamur.ai/free/en/) · [Research](https://md.research.elamur.ai/free/en/) · **Groupants**

This page as HTML: <https://groupants.elamur.ai/free/en/mova/tools/bench/src/main.rs.groupant/>

# bench-main

The groupant beside tools/bench/src/main.rs in the Mova repository: what the code computes, what it never does, how to go back from its outputs, its invariants, cost and checks.

## Facts

- **kind:** groupant
- **status:** partial source bound model
- **source:** [`tools/bench/src/main.rs`](https://github.com/ElamurAI/mova-free/blob/main/tools/bench/src/main.rs)
- **source SHA-256:** `7a5aff2d66b34bbe…`
- **repository folder:** [`tools/bench/src/main.rs.groupant`](https://github.com/ElamurAI/mova-free/tree/main/tools/bench/src/main.rs.groupant)
- **repository commit:** `48f2e6f74146`

> **Implementation material.** A Mova code model describes this code at one source revision: partial models, finite checks and their stated scope. It is not a reviewed general exposition, and its labels are shown as written, never raised.

## Components

| component | label | where |
|---|---|---|
| **approximant** | partial | `model.md` |
| **ast** | partial | `syntax.json` |
| **composition** | partial | [Composition](#composition) |
| **cost** | partial | [invariant-and-cost](#invariant-and-cost) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant-and-cost](#invariant-and-cost) |
| **tests** | bounded or representation | [tests](#tests) |

## Obernants

The typed relations around the forward model: the behaviour complement (what the code never does), the reverse reconstruction (every input compatible with an output) and specialised views.

| id | type | label | where |
|---|---|---|---|
| `behavior_complement` | behavior_complement | partial source derived model | [behavior_complement](#behavior-complement) |
| `reverse_reconstruction` | reverse_reconstruction | partial source derived model | [reverse_reconstruction](#reverse-reconstruction) |
| `stream_order` | stream_order | partial source derived model | [stream_order](#stream-order) |
| `numeric_lexer` | numeric_lexer | partial source derived model | [numeric_lexer](#numeric-lexer) |
| `header_epoch` | header_epoch | partial source derived model | [header_epoch](#header-epoch) |
| `quick_scope` | quick_scope | partial source derived model | [quick_scope](#quick-scope) |

## Parts

- [bench-main-extract](https://md.groupants.elamur.ai/free/en/mova/tools/bench/src/main.rs.groupant/extract.groupant/)

## Model text


### descriptant

#### bench-main

##### Epoch 2026-10-31

Prospective inspection identified this relation before additions: run launches requested root-relative command with supplied args/env, concatenates lossy stdout then stderr, selects first trimmed-prefix line and digit/dot token by index, defaults ?, adds rounded elapsed seconds. Main invokes fixed benchmarks and appends TSV, adding header when latest header differs.

The production implementation is unchanged; only selected inline tests are appended. Source-bound syntax is generated twice and compared. Native checks exercise bounded helpers; entry orchestration, teacher calls, models and corpora remain source-derived. Partial syntax is not semantic proof. Preserve failure prefixes and ambiguity when refining this model.

### approximant

## Forward relation

run launches requested root-relative command with supplied args/env, concatenates lossy stdout then stderr, selects first trimmed-prefix line and digit/dot token by index, defaults ?, adds rounded elapsed seconds. Main invokes fixed benchmarks and appends TSV, adding header when latest header differs.

### Composition

Tagged independent measurement reporter; no caller join to cycle. Its helper subprocess protocol is tested with synthetic child; real math/world outputs and dataset quality remain unsupported.

### catalog

## Typed observations: bench-main

Subject: tools/bench/src/main.rs, SHA-256 7a5aff2d66b34bbe237903eefacc2f794692b2b28ca50dfb0595422fd443326e. Domain: bounded source inputs, declared filesystem/environment state and normal allocations. Each view is a partial source-derived relation, not a universal proof. Observation is one helper call or the explicitly described trace. Checks are in tests.md; unexecuted effects remain gaps.

### behavior_complement

Missing prefix/index yields ?, not numeric zero. Nonzero child exit is not excluded from Ok metrics; treating metrics as successful benchmark status would be wrong.

Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.

### reverse_reconstruction

Metric strings admit many stdout/stderr texts and child statuses. Minus/exponent loss makes -3.5 and 3.5 compatible; first-prefix selection hides all later matching rows.

Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.

### stream_order

Combined observation is complete stdout then stderr, not chronological interleaving. Matching stdout line wins over stderr regardless of real emission time.

Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.

### numeric_lexer

Split on everything except ASCII digits/dot, keep token only if some digit. 2e4 becomes 2,4; -3.5 becomes 3.5; malformed multiple-dot token may survive as string.

Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.

### header_epoch

Read old table, find last time-tab header; append header iff unequal, then row. Old rows retained in successful write but full-file overwrite is not crash-atomic.

Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.

### quick_scope

--quick removes only GSM8K. SVAMP training-like commands, world read/train and values remain; no authorization to run main follows from helper coverage.

Scope: the bound source interval and stated assumptions. Evidence: source inspection plus the checks explicitly named in tests.md; no finite check establishes all inputs.

### tests

#### Checks and limits

wave33_tests::synthetic_extraction_preserves_current_lossiness executes actual run with bounded /bin/sh emitting literal stdout/stderr and exit 7 under temp MOVA_ROOT. No benchmark CLI or frozen benchmark.

Exact native outcomes and command metadata are retained in the external wave33 cycle receipt bundle. Selected names run twice in debug and release; syntax is independently regenerated twice. Compiled mutations and source restoration receipts distinguish behavior changes from assertion-only controls. These claims are finalized in evidence.md. No live teacher, real model/corpus, benchmark CLI or lesson-learning CLI is run.

### evidence

#### Wave33 evidence — 2026-10-31

Across this nine-source slice, 14 exact native names passed twice in debug and twice in release (56 runs); sorted target-qualified outcomes agree. Six compiled behavior controls fail named assertions and exact restored bytes pass again. One exploratory parser-count control failed by unwrap panic; it was restored and replaced by a form-column assertion control. No assertion-only control is counted.

Nine syntax projections were generated twice and byte compared. Production source prefixes match the base exactly; four files append only formatted cfg(test) blocks. Local groupants validation reports valid=true, zero diagnostics. Counts: nine source roots, ten scoped children, 114 typed views.

See tests.md for this source's precise executed or representation-only coverage. Native evidence does not apply to ignored live teacher or lesson execution. No teacher/API, model/corpus, learning or benchmark CLI was run. Receipts retain numeric statuses, exact names, log/source hashes, original backups, unique mutation replacements and restoration assertions. The external bundle is named octopus-wave33-cycle-2026-10-31.

### invariant-and-cost

#### Invariant and cost

run ignores nonzero child exit status. Numeric lexer drops sign and splits exponent; values remain strings. Main quick only excludes GSM8K, not other expensive/frozen paths; main never executed here.

Per run O(captured bytes×picks + command cost), captures output in memory. Main reads and rewrites entire old TSV O(history bytes); timing excludes no child work but includes process wait.

No executable percentage surrogate is claimed: effects, categorical acceptance and report text have no justified approximate metric here. Future profiles require a useful metric, zero case, reference and evidence at caps 1/2/5/10%.