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`Liveness::users` is a vector that is occasionally enormous. For example, doing a "clean incremental" check build of `inflate`, there is one instance that represents 5,499 live nodes and 1087 vars, which requires 5,977,413 entries. At 24 bytes per entry, that is 143MB. This patch changes LiveNode from a usize to a u32. On 64-bit machines that halves the size of these entries, significantly reducing peak memory usage and memory traffic, and speeding up "clean incremental" builds of `inflate` by about 10%.
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@nnethercote really we ought to remove the UPDATE: filed #51003 |
nikomatsakis
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@bors r+ |
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📌 Commit 8d0fad5 has been approved by |
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This is the old bloated inflate, right? I feel like we should make that more explicit - people actually using the crate today won't see anything, the piles of code liveness (and presumably borrowck too) chokes on, are gone. |
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…matsakis Shrink `LiveNode`. `Liveness::users` is a vector that is occasionally enormous. For example, doing a "clean incremental" check build of `inflate`, there is one instance that represents 5,499 live nodes and 1087 vars, which requires 5,977,413 entries. At 24 bytes per entry, that is 143MB. This patch changes LiveNode from a usize to a u32. On 64-bit machines that halves the size of these entries, significantly reducing peak memory usage and memory traffic, and speeding up "clean incremental" builds of `inflate` by about 10%.
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Rollup of 9 pull requests Successful merges: - #50864 (Add NetBSD/arm target specs) - #50956 (rust-gdb: work around the re-used -d argument in cgdb) - #50964 (Make sure that queries have predictable symbol names.) - #50965 (Update LLVM to pull in another wasm fix) - #50972 (Add -Z no-parallel-llvm flag) - #50979 (Fix span for type-only arguments) - #50981 (Shrink `LiveNode`.) - #50995 (move type out of unsafe block) - #51011 ( rustdoc: hide macro export statements from docs) Failed merges:
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Liveness::usersis a vector that is occasionally enormous. Forexample, doing a "clean incremental" check build of
inflate, there isone instance that represents 5,499 live nodes and 1087 vars, which
requires 5,977,413 entries. At 24 bytes per entry, that is 143MB.
This patch changes LiveNode from a usize to a u32. On 64-bit machines
that halves the size of these entries, significantly reducing peak
memory usage and memory traffic, and speeding up "clean incremental"
builds of
inflateby about 10%.