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Compiler Performance Issue in BlockGridView.swift #8
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Originally created by @jchillah on GitHub (Mar 3, 2025).
The Swift compiler is unable to type-check the ForEach expression in BlockGridView.swift within a reasonable time. This issue occurs at line 67, where a complex mapping operation is performed inside ForEach.
Steps to Reproduce:
Open BlockGridView.swift
Try to build the project
The compiler fails with the message:
"The compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions."
Expected Behavior:
The project should compile without performance issues.
Actual Behavior:
Compilation takes too long or fails due to the complexity of the expression.
Proposed Fix:
Move the .map { ... } operation outside of ForEach to reduce the computational overhead.
Use explicit indices instead of inline transformations to optimize type-checking.
References:
Related Swift compiler issue: Swift Compiler Performance Guide