Shrink LiveNode.
#50981
Merged
Shrink LiveNode.
#50981
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
`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%.
|
(rust_highfive has picked a reviewer for you, use r? to override) |
rust-highfive
added
the
S-waiting-on-review
|
@nnethercote really we ought to remove the UPDATE: filed #51003 |
nikomatsakis
approved these changes
May 23, 2018
|
@bors r+ |
|
📌 Commit 8d0fad5 has been approved by |
bors
added
S-waiting-on-bors
|
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. |
kennytm
added a commit
to kennytm/rust
that referenced
this pull request
May 24, 2018
…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%.
bors
added a commit
that referenced
this pull request
May 24, 2018
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:
# for free
to join this conversation on GitHub.
Already have an account?
# to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
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%.