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Issue #17103 has been updated by matz (Yukihiro Matsumoto).
OK. Accepted.
Matz.
----------------------------------------
Feature #17103: Add a :since option to ObjectSpace.dump_all
https://bugs.ruby-lang.org/issues/17103#change-87309
* Author: byroot (Jean Boussier)
* Status: Open
* Priority: Normal
----------------------------------------
Patch: https://github.com/ruby/ruby/pull/3368
This is useful for seeing what a block of code allocated, e.g.
```ruby
GC.start
GC.disable
gc_gen = GC.count
ObjectSpace.trace_object_allocations do
# run some code
end
allocations = ObjectSpace.dump_all(output: :file, since: gc_gen)
GC.enable
GC.start
retentions = ObjectSpace.dump_all(output: :file, since: gc_gen)
```
For context, this is what I do in https://github.com/Shopify/heap-profiler, except that I have to dump the entire heap three times and then do a diff. This new API would allow me to dump the entire heap only once and then do two much-faster single-generation dumps without doing the diff.
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