Feature #11569: Optimize Proc#call

• Status: Closed
• Assignee: ko1 (Koichi Sasada)
• Target version: -

[ko1 (Koichi Sasada)]

Some years ago, I added optimized Proc#call that skips construction of a method frame for Proc#call and call block directly.
That time, test-all shows some failures.

However, I tried it now it doesn't show any errors.
So that I will enable it.

This change introduces incompatibilities.

(1) Backtrace doesn't show Proc#call line.

->{
  puts caller(0)
}.call

# current
test.rb:4:in `block in <main>'
test.rb:5:in `call'
test.rb:5:in `<main>'

# optimized
../../trunk/test.rb:4:in `block in <main>'
../../trunk/test.rb:5:in `<main>'

(2) TracePoint ignores Proc#call call.

TracePoint.new(:a_call){|tp| p tp}.enable
->{}.call

# current
#<TracePoint:c_call `call'@test.rb:2>
#<TracePoint:[e-mail]:2>

# optimized
#<TracePoint:b_call@../../trunk/test.rb:2>

Let me know if you have trouble with these incompatibilities.

BTW, Object#send has already same technique (and behavior with (1), (2)).

[ko1 (Koichi Sasada)]

• Status changed from Open to Closed

Applied in changeset r52050.

---

• proc.c: enable optimization of Proc#call.
  [Feature #11569]
• NEWS: write about this optimization and incompatibilities.
• test/ruby/test_backtrace.rb: catch up this fix.

[usa (Usaku NAKAMURA)]

• Related to Bug #12332: [PATCH] proc.c: fix RDoc of Proc#===/call/yield/[] added