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@nordlow nordlow commented Oct 14, 2025

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Thanks for your pull request and interest in making D better, @nordlow! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
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}
}

pragma(inline, true)
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This file is auto-generated by tools/unicode_table_generator.d, so it should be modified in the toSourceCode function at std/uni/package.d.

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Leave this module alone please.

Unicode tables are one place where the value is much lower in inlining due to the cost of the algorithms that call them.

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We'll merge this once the pragmas are removed from this file.

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@LightBender What's the answer to #10880 (comment) ?

}
}

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Leave this module alone please.

Unicode tables are one place where the value is much lower in inlining due to the cost of the algorithms that call them.

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I don't understand what this pull request is trying to solve.

The point of the inline pragma is to override the optimizer's decisions. It should be used only when the optimizer has made an incorrect decision.

The optimizer is also highly specific to the backend.

I can see how the pragma can be useful in specific scenarios where profiling and disassembling revealed that the specific optimizer has made a suboptimal decision with a specific program. I don't see how this applies to the standard library, which can be compiled by any D compiler.

So, isn't the correct number of pragma(inline) directives in Phobos equal to 0?

@kubo39
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kubo39 commented Oct 16, 2025

Anyway I think it should be measured when adding inline attributes.

So, isn't the correct number of pragma(inline) directives in Phobos equal to 0?

Q: I believe it's useful for cross-module inlining in LDC (although LDC has a cross-module-inlining flag, but it is hidden), and that would affect all programs using the standard library, wouldn't it?

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Maybe, but is that the right solution? We would then be using a vendor-agnostic compiler directive to improve one specific vendor's compiler.

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6 participants