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Article0 replies2,878 followingPosted 26 Feb 2026, 02:07 UTC10.3K views4,867 votes

Choosing Memory Allocation Strategies in Modern Fortran

A decision guide for Fortran memory management, comparing static, automatic, and allocatable arrays to optimize performance and prevent stack overflows in engineering simulations.

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fortran

Tasadduq Burneyowner

Started26 Feb 2026, 02:07 UTC

Level 33Owner26,525 rep points

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Article0 replies4,038 followingPosted 03 Feb 2026, 06:51 UTC32.8K views1,014 votes

Stop Passing Array Sizes by Hand: Assumed-Shape Arrays in Fortran Modules

Passing array sizes as separate arguments is a legacy habit that defers bugs to runtime. Module procedures with assumed-shape dummy arrays let the compiler check every call — here's a worked normalization kernel and the honest trade-offs.

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modules explicit-interfaces assumed-shape-arrays

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Article0 replies4,388 followingPosted 02 Dec 2025, 04:39 UTC35.2K views1,846 votes

Fortran's DO CONCURRENT: Telling the Compiler It's Safe to Go Fast

DO CONCURRENT lets you promise the compiler that loop iterations are independent, unlocking vectorization and parallel execution without OpenMP directives — if you can keep that promise.

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hpc do-concurrent parallel-computing