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abstract indexed · arXiv 2609.38201 · updated 2026-10-18

TomasuLLM: Out-of-Order Speculative Execution for LLM Agents

First page of TomasuLLM: Out-of-Order Speculative Execution for LLM Agents
From the original paper · arXiv 2609.38201Page 1. Select the image to read the PDF.

It replaces the sequential tool-call loop of a coding agent, in which the model idles while long-running tools execute, with a runtime that drafts future actions, executes them in copy-on-write sandboxes, and commits results in trajectory order after validation. It costs sandboxing and dependency/effect-tracing infrastructure, extra compute for speculative executions that are later invalidated, and substantial engineering complexity beyond a single-GPU deployment. It can fail when drafted actions diverge from the actual trajectory, making wasted speculative runs offset the latency gains on workloads with short or unpredictable tool calls.

For solo builders

A possible application for this research area. Paper-specific feasibility still needs a full-paper review.

An assistant chooses the wrong API or sends arguments your product cannot use.

What you would change

Apply the proposed tool-selection or argument-generation change in a sandbox.

Try the idea on your product

A proposed first test. Set your budget and success criteria before running it.

Apply the proposed tool-selection or argument-generation change in a sandbox.

Compare against

Your current agent with the same tool schemas and task budget.

  1. Locate the paper's implementation and check its license, model support, data needs, and hardware requirements. Stop here if you cannot obtain the required artifacts.
  2. Save a small set of representative product tasks and expected outcomes. Keep evaluation tasks out of any training or tuning, and choose quality and cost limits before running.
  3. Run the baseline and the proposed change on identical inputs. Keep other settings fixed and repeat paired runs to expose variation.
  4. Save per-task outputs, failures, timings, and all usage costs. Review regressions before expanding the test.

What to measure

Correct completed actions, invalid calls, retries, latency, and cost per completed task.

When to keep it

Keep the change only if it meets your preselected quality and latency limits and improves the metric you care about after setup and operating costs. Otherwise retain the baseline. This is an exploration plan, not a validated recommendation.

Download test plan ↓

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Abstract-level screening only. Risks and infrastructure may not have been evaluated. This recommendation is not a reproduced result.
minimum test setup
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published evidence setup
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source-linked claims
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exposure checks
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Why it was shortlisted

The technical change, research area, and reason it entered the archive.

recommendation
watch
research area
tool use
technical change
Out-of-order speculative tool execution for agents
published
2026-09-22

The speedup is real but modest and depends on a correctness-critical sandboxing and commit-validation runtime that a small team with constrained infrastructure would have to build and maintain, so it is worth tracking rather than adopting now.

About the technical core

Equations have not been fetched yet.

When reading the methods, identify the rule, algorithm, or evaluation protocol that produces the claimed change. An equation is useful here only if it explains that mechanism.

Inspect the original paper

Claims and evidence

A claim is source-linked only when the PDF page and matching excerpt are available.

  1. claim 01Paperraft inference
    Read the brief interpretation

    It replaces the sequential tool-call loop of a coding agent, in which the model idles while long-running tools execute, with a runtime that drafts future actions, executes them in copy-on-write sandboxes, and commits results in trajectory order after validation. It costs sandboxing and dependency/effect-tracing infrastructure, extra compute for speculative executions that are later invalidated, and substantial engineering complexity beyond a single-GPU deployment. It can fail when drafted actions diverge from the actual trajectory, making wasted speculative runs offset the latency gains on workloads with short or unpredictable tool calls.

    This is a Paperraft inference. It is not pinned to a verified PDF passage.

    Inspect the source
  2. claim 02Paperraft inference

    1.31x on 100 SWE-bench Verified tasks, 1.35x on 28 Terminal-Bench 2.0 tasks, and 1.27x matched progress on 18 SWE-Marathon sessions; zero false accepts across 4,010 commit-validation records.

    This is a Paperraft inference. It is not pinned to a verified PDF passage.

    Inspect the source

Exposure map

Author findings, Paperraft interpretations, and the next check. Missing analysis never counts as evidence of safety.

quality

Still unknown

Which tasks improve, and which regress against the baseline?

compute and memory

Still unknown

What memory, hardware, and total compute does the complete method require?

latency

Still unknown

Are startup time, typical response time, and slow requests measured separately?

operations

Still unknown

What must be monitored, maintained, and rolled back?

software compatibility

Still unknown

Does the implementation support your model, runtime, and hardware?

security

Still unknown

What new data access, permissions, or trust boundaries does it introduce?

data and training

Still unknown

What data preparation or training is required, and is it included in the cost?

reproducibility

Still unknown

Are code, versions, inputs, and evaluation scripts available?

Continue the investigation

A reading guide for tool use.

Editorial prompts, not findings from this paper or a validated test plan. Detailed analysis is still pending for the topics below.

What to inspect

Which assumptions does the proposed method need, and where might your workload violate them?

Plan a fair comparison

Identify the baseline, metric, dataset, and experimental settings in the paper. Which can you match?

Questions for adoption

What implementation and evaluation artifacts are available, and what would you need to supply?

Read the paper with these questions

Inside the paper

Preview the first 3 pages of the original PDF. Click the stack to turn the page.

The downloadable skill includes SKILL.md and evidence.json, with recorded findings and unanswered checks. TRY-IT.md adds a product test plan and a blank results sheet.

A reading aid for your agent. Findings still need validation.

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Provisional research brief updated 2026-10-18. Paperraft has not reproduced this experiment.

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arXiv 2609.38201

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