# Ethereum Researchers Weigh Where to Place a Deadline That Governs Reorgs

A new study on the epoch-boundary attestation timing argues the Glamsterdam upgrade's choice of second two, three or four in a slot carries a measurable cost to chain stability.

- Published: 2026-07-01T10:31:41.172Z
- Canonical: https://polylog.news/crypto/2026-07-01/ethereum-researchers-weigh-where-to-place-a-deadline-that-go
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [Ethereum Research](https://ethresear.ch/t/is-the-slot-0-reorg-cost-fixable-epbs-attestation-deadline-study/25338)

Ethereum's core researchers are debating a narrow but consequential parameter as they design the Glamsterdam upgrade. A study posted to the Ethereum Research forum examines where in each twelve-second slot the attestation deadline should si…

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