Landing: e47eccbe6d11

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Project / Subsystem

gcc / cobol

Date

2026-09-21

Author

Robert Dubner

Commit

e47eccbe6d118023e4fe83bde14075729c40e030

Source

github

Perf win

Yes

Breaking

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All attributes

project: gcc
subsystem: cobol
patch_id: —
commit_hash: e47eccbe6d118023e4fe83bde14075729c40e030
source_type: github
headline: cobol: Improve numeric-edited formatting speed by moving processing to compile time.
tldr: COBOL numeric-edited output formatting is faster by performing PICTURE clause processing at compile time instead of runtime.
author: Robert Dubner
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • cobol
• optimization
• performance
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/e47eccbe6d118023e4fe83bde14075729c40e030
date: 2026-09-21T00:00:00.000Z

The performance of converting numerical strings to numeric-edited variables in GCC’s COBOL compiler has been significantly improved. This optimization is achieved by moving the processing of PICTURE clauses, which define the format of edited numeric output, from runtime execution to compile time. This reduces the overhead during program execution by pre-calculating and embedding formatting information directly into the compiled code.