Andrew Kelley 61978c8c94 InternPool: eliminate indexToKey call graph cycle
Recursion makes this hot function more difficult to profile and
optimize.

I measured a 1.05x speedup vs the previous commit with the (set of
passing) behavior tests.

This commit was the last in a series, and the main thing it needed to do
was make InternPool.typeOf not call indexToKey(). This required adding a
type field to the runtime_value encoding even though it is technically
redundant. This could have been avoided with a loop inside typeOf, but I
wanted to keep the machine code of that hot function as simple as
possible. The variable encoding is still responsible for a relatively
small slice of the InternPool data size.

I added a function that provides the payload type corresponding to the
InternPool.Tag type, which allows for some handy inline switch prongs.

Let's start moving the structs that are specific to InternPool.Tag into
the corresponding namespace. This will provide type safety if the
encoding of InternPool changes for these types later.
2023-06-10 20:47:57 -07:00
2023-06-10 20:47:56 -07:00
2022-12-31 18:13:00 +00:00

ZIG

A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.

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The ultimate goal of the Zig project is to serve users. As a first-order effect, this means users of the compiler, helping programmers to write better software. Even more important, however, are the end-users.

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General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
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