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​​Profiling of rustc-perf’s benchmark examples

​​Current profiling results for clap-rs

• ​​MIR borrowck (49%)

• ​​compute-regions (29%)

• ​​type-check-internal (22%) — Niko is looking at this

• ​​subtype_constraint_generation::generate (2%) — Niko is looking at this

• ​​liveness_of_locals (1%)

• ​​RegionInferenceContext::solve (1%)

• ​​visit_mir (7%) — what is this ??

• ​​(as extra context to above note: the issue is that visit_mir​ is called from many places and we are not clear on why it appears, according to the profile, to be called many times directly from do_mir_borrowck​…)

• ​​DataFlowResultsConsumer::analyze_results (7%)

• ​​access_place (4%)

• ​​do_dataflow (2%) — this would maybe be faster with datafrog…

​​

​​Current profiling results for inflate

​​[santiago@archlinux inflate (master)]$ perf focus '{do_mir_borrowck}'

​​Matcher : {do_mir_borrowck}

​​Matches : 2290

​​Not Matches: 331

​​Percentage : 87%

​​[santiago@archlinux inflate (master)]$ perf focus '{do_mir_borrowck}' --tree-callees --tree-min-percent 3

​​Matcher : {do_mir_borrowck}

​​Matches : 2290

​​Not Matches: 331

​​Percentage : 87%

​​Tree

​​| matched {do_mir_borrowck} (87% total, 0% self)

​​: | rustc_mir::borrow_check::nll::compute_regions (72% total, 0% self)

​​: : | rustc_mir::borrow_check::nll::type_check::type_check_internal (64% total, 0% self)

​​: : : | rustc_mir::borrow_check::nll::type_check::type_check::_$u7b$$u7b$closure$u7d$$u7d$::h5e644cf9693979bb (63% total, 0% self)

​​: : : : | rustc_mir::borrow_check::nll::type_check::liveness::generate (63% total, 59% self)

​​: : | rustc_mir::borrow_check::nll::region_infer::RegionInferenceContext::solve (6% total, 0% self)

​​: : : | rustc::util::common::time (6% total, 0% self)

​​: : : : | rustc_mir::borrow_check::nll::region_infer::RegionInferenceContext::solve_inner (6% total, 0% self)

​​: : : : : | rustc_mir::borrow_check::nll::region_infer::RegionInferenceContext::compute_region_values (6% total, 0% self)

​​: : : : : : | >::merge (6% total, 0% self)

​​: : : : : : : | >::entry (5% total, 1% self)

​​: : : : : : : : | alloc::btree::search::search_tree (3% total, 0% self)

​​: : : : : : : : : | alloc::btree::search::search_tree (3% total, 3% self)

​​: | rustc::mir::visit::Visitor::visit_mir (5% total, 3% self)

​​: | as rustc_mir::dataflow::DataflowResultsConsumer<'cx, 'tcx>>::visit_statement_entry (4% total, 0% self)

​​: | rustc_mir::dataflow::do_dataflow (3% total, 0% self)

​​