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Re: Examples on why ungrafting is necessary

From: Leo Famulari
Subject: Re: Examples on why ungrafting is necessary
Date: Sun, 14 Mar 2021 16:43:39 -0400

On Thu, Mar 11, 2021 at 02:16:16PM +0100, zimoun wrote:
> Updating the package r-chemminer, it leads to this huge stack of
> grafts.  To be concrete, it is 84 grafts for a “simple” R packages.  On
> my machine, the grafting steps are longer than building (compiling and R
> dance).

The performance of grafting largely corresponds to I/O speed.

> We definitively need a way to tackle this.  Maybe when is in frozen
> state, we could spend 2-5 days to tackle as much as graft that we can.
> The previous Leo’s initiative is really worth and maybe we should have a
> hackathon or something because my feeling is that more grafts are added
> than removed.

To clarify: the number of grafts added is exactly the same number of
grafts that are removed. But, it takes longer to remove them, because
ungrafted requires us to recompile every affected package.

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