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Long compilation time of crate "unicode-normalization" #55528

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Long compilation time of crate "unicode-normalization"#55528
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I-compiletimeIssue: Problems and improvements with respect to compile times.
@jens1o

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@jens1o
jens1o
opened on Oct 31, 2018
Contributor

Hey folks,

I was told to create an issue here. When compiling crates, I often see this crate holding up the overall process, and because others are depending on it, it grabs one cpu core and the others are literally idle and I need to wait.

Yeah this contains some giant match statements which are slow. We could perhaps use something like phf_map here but that may not improve compile times.

-- @Manishearth

I'd be thankful if there are some efforts to make it faster. :)

ref unicode-rs/unicode-normalization#29

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matthiaskrgr

matthiaskrgr commented on Oct 31, 2018

@matthiaskrgr
matthiaskrgr
on Oct 31, 2018
Member

item-bodies checking and match checking take a lot of time:
RUSTFLAGS="-Z time-passes -Ccodegen-units=1" cargo check

   Checking unicode-normalization v0.1.7 (/tmp/unicode-normalization)
  time: 0.083; rss: 67MB    parsing
  time: 0.000; rss: 67MB    attributes injection
  time: 0.000; rss: 68MB    garbage collect incremental cache directory
  time: 0.000; rss: 68MB    recursion limit
  time: 0.000; rss: 68MB    crate injection
  time: 0.000; rss: 68MB    plugin loading
  time: 0.000; rss: 68MB    plugin registration
  time: 0.000; rss: 68MB    background load prev dep-graph
  time: 0.006; rss: 68MB    pre ast expansion lint checks
    time: 0.032; rss: 86MB  expand crate
    time: 0.000; rss: 86MB  check unused macros
  time: 0.032; rss: 86MB    expansion
  time: 0.000; rss: 86MB    maybe building test harness
  time: 0.001; rss: 86MB    maybe creating a macro crate
  time: 0.004; rss: 88MB    creating allocators
  time: 0.003; rss: 88MB    AST validation
  time: 0.010; rss: 91MB    name resolution
  time: 0.001; rss: 91MB    complete gated feature checking
  time: 0.000; rss: 91MB    blocked while dep-graph loading finishes
  time: 0.016; rss: 102MB   lowering ast -> hir
  time: 0.009; rss: 102MB   early lint checks
  time: 0.020; rss: 110MB   indexing hir
  time: 0.000; rss: 96MB    load query result cache
  time: 0.000; rss: 96MB    looking for entry point
  time: 0.000; rss: 96MB    looking for plugin registrar
  time: 0.001; rss: 96MB    loop checking
  time: 0.002; rss: 102MB   attribute checking
  time: 0.005; rss: 102MB   stability checking
  time: 0.018; rss: 121MB   type collecting
  time: 0.000; rss: 121MB   outlives testing
  time: 0.000; rss: 121MB   impl wf inference
  time: 0.042; rss: 129MB   coherence checking
  time: 0.000; rss: 129MB   variance testing
  time: 0.035; rss: 136MB   wf checking
  time: 0.007; rss: 138MB   item-types checking
  time: 12.114; rss: 153MB  item-bodies checking
  time: 0.035; rss: 154MB   rvalue promotion
  time: 0.016; rss: 154MB   privacy checking
  time: 0.002; rss: 154MB   intrinsic checking
  time: 9.746; rss: 158MB   match checking
  time: 0.003; rss: 158MB   liveness checking
  time: 0.364; rss: 181MB   borrow checking
  time: 0.000; rss: 181MB   MIR borrow checking
  time: 0.000; rss: 181MB   dumping chalk-like clauses
  time: 0.000; rss: 181MB   MIR effect checking
  time: 0.004; rss: 181MB   death checking
  time: 0.001; rss: 181MB   unused lib feature checking
  time: 0.012; rss: 181MB   lint checking
  time: 0.000; rss: 181MB   resolving dependency formats
    time: 0.004; rss: 182MB write metadata
    time: 0.000; rss: 182MB assert dep graph
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::type_of
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::generics_of
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::predicates_of
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::used_trait_imports
            time: 0.004; rss: 183MB encode_query_results for rustc::ty::queries::typeck_tables_of
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::codegen_fulfill_obligation
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::optimized_mir
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::unsafety_check_result
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::borrowck
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::mir_borrowck
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::mir_const_qualif
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::def_symbol_name
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::const_is_rvalue_promotable_to_static
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::symbol_name
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::check_match
            time: 0.000; rss: 183MB encode_query_results for rustc::ty::queries::codegen_fn_attrs
            time: 0.000; rss: 184MB encode_query_results for rustc::ty::queries::specialization_graph_of
          time: 0.005; rss: 184MB   encode query results
        time: 0.007; rss: 184MB serialize query result cache
      time: 0.007; rss: 184MB   persist query result cache
          time: 0.001; rss: 185MB   getting serialized graph
          time: 0.001; rss: 185MB   encoding serialized graph
        time: 0.002; rss: 185MB encode dep-graph
      time: 0.003; rss: 185MB   persist dep-graph
    time: 0.010; rss: 185MB serialize dep graph
  time: 0.015; rss: 185MB   codegen
  time: 0.000; rss: 118MB   serialize work products
  time: 0.000; rss: 118MB   linking
    Finished dev [unoptimized + debuginfo] target(s) in 22.94s

building:
RUSTFLAGS="-Z time-passes -Ccodegen-units=1" cargo build --release

   Compiling unicode-normalization v0.1.7 (/tmp/unicode-normalization)
  time: 0.070; rss: 67MB    parsing
  time: 0.000; rss: 67MB    attributes injection
  time: 0.000; rss: 67MB    recursion limit
  time: 0.000; rss: 67MB    crate injection
  time: 0.000; rss: 67MB    plugin loading
  time: 0.000; rss: 67MB    plugin registration
  time: 0.006; rss: 68MB    pre ast expansion lint checks
    time: 0.032; rss: 86MB  expand crate
    time: 0.000; rss: 86MB  check unused macros
  time: 0.032; rss: 86MB    expansion
  time: 0.000; rss: 86MB    maybe building test harness
  time: 0.001; rss: 86MB    maybe creating a macro crate
  time: 0.004; rss: 87MB    creating allocators
  time: 0.002; rss: 87MB    AST validation
  time: 0.011; rss: 90MB    name resolution
  time: 0.001; rss: 90MB    complete gated feature checking
  time: 0.017; rss: 101MB   lowering ast -> hir
  time: 0.011; rss: 101MB   early lint checks
  time: 0.022; rss: 109MB   indexing hir
  time: 0.000; rss: 96MB    load query result cache
  time: 0.000; rss: 96MB    looking for entry point
  time: 0.000; rss: 96MB    looking for plugin registrar
  time: 0.001; rss: 96MB    loop checking
  time: 0.002; rss: 96MB    attribute checking
  time: 0.004; rss: 96MB    stability checking
  time: 0.012; rss: 114MB   type collecting
  time: 0.000; rss: 114MB   outlives testing
  time: 0.000; rss: 114MB   impl wf inference
  time: 0.026; rss: 122MB   coherence checking
  time: 0.000; rss: 122MB   variance testing
  time: 0.022; rss: 128MB   wf checking
  time: 0.006; rss: 128MB   item-types checking
  time: 11.912; rss: 138MB  item-bodies checking
  time: 0.033; rss: 139MB   rvalue promotion
  time: 0.016; rss: 139MB   privacy checking
  time: 0.002; rss: 139MB   intrinsic checking
  time: 8.093; rss: 146MB   match checking
  time: 0.004; rss: 146MB   liveness checking
  time: 0.261; rss: 170MB   borrow checking
  time: 0.000; rss: 170MB   MIR borrow checking
  time: 0.000; rss: 170MB   dumping chalk-like clauses
  time: 0.000; rss: 170MB   MIR effect checking
  time: 0.004; rss: 170MB   death checking
  time: 0.002; rss: 170MB   unused lib feature checking
  time: 0.012; rss: 170MB   lint checking
  time: 0.000; rss: 170MB   resolving dependency formats
    time: 0.177; rss: 171MB write metadata
      time: 0.000; rss: 171MB   collecting roots
      time: 0.002; rss: 171MB   collecting mono items
    time: 0.002; rss: 171MB monomorphization collection
    time: 0.000; rss: 171MB codegen unit partitioning
    time: 0.007; rss: 174MB codegen to LLVM IR
    time: 0.000; rss: 174MB assert dep graph
    time: 0.000; rss: 174MB serialize dep graph
  time: 0.188; rss: 174MB   codegen
    time: 0.006; rss: 153MB llvm function passes [unicode_normalization.boavajsv-cgu.0]
    time: 0.079; rss: 122MB llvm module passes [unicode_normalization.boavajsv-cgu.0]
    time: 0.114; rss: 128MB codegen passes [unicode_normalization.boavajsv-cgu.0]
  time: 0.207; rss: 127MB   LLVM passes
  time: 0.000; rss: 126MB   serialize work products
  time: 0.005; rss: 124MB   linking
    Finished release [optimized] target(s) in 21.12s
jens1o

jens1o commented on Oct 31, 2018

@jens1o
jens1o
on Oct 31, 2018
ContributorAuthor

happy to know I'm not the only one :)

jens1o

jens1o commented on Dec 14, 2018

@jens1o
jens1o
on Dec 14, 2018
ContributorAuthor

Is there something to do to get this triaged?

Manishearth
added
I-slowIssue: Problems and improvements with respect to performance of generated code.
on Dec 14, 2018
nikic
added
I-compiletimeIssue: Problems and improvements with respect to compile times.
and removed
I-slowIssue: Problems and improvements with respect to performance of generated code.
on Dec 15, 2018
dotdash
mentioned this on Jan 10, 2019
bors
added a commit that references this issue on Jan 10, 2019

Auto merge of #57494 - dotdash:expand, r=<try>

960c730
dotdash
mentioned this on Jan 12, 2019
bors
added a commit that references this issue on Jan 12, 2019

Auto merge of #57546 - dotdash:match, r=<try>

f81ba2b
pietroalbini
added a commit that references this issue on Jan 12, 2019

Rollup merge of rust-lang#57494 - dotdash:expand, r=nikomatsakis

085d06c
jens1o
mentioned this on Jan 26, 2019
nnethercote

nnethercote commented on Jan 27, 2019

@nnethercote
nnethercote
on Jan 27, 2019
Contributor

Note that #57718 has some detailed profile measurements.

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          Long compilation time of crate "unicode-normalization" · Issue #55528 · rust-lang/rust