Issue #19907 has been updated by jhawthorn (John Hawthorn). https://github.com/ruby/ruby/pull/9973 I've opened a PR to de-dup identical callinfo, which will also in this case avoid the allocation of unnecessary callcache. Running the script above: ``` Number of live objects: 9139 Memory usage: 19620 Number of live objects: 13132 Memory usage: 19620 Number of live objects: 12728 Memory usage: 19620 Number of live objects: 13451 Memory usage: 19620 Number of live objects: 10028 Memory usage: 19620 Number of live objects: 13150 Memory usage: 19620 Number of live objects: 12210 Memory usage: 19620 Number of live objects: 12538 Memory usage: 19620 Number of live objects: 9023 Memory usage: 19620 Number of live objects: 11948 Memory usage: 19620 ``` ---------------------------------------- Bug #19907: Method calls with keyword arguments in eval leaks callcache and callinfo objects https://bugs.ruby-lang.org/issues/19907#change-106809 * Author: peterzhu2118 (Peter Zhu) * Status: Open * Priority: Normal * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- The following script leaks callcache and callinfo objects: ```ruby def foo(a:); end 10.times do 10_000.times do eval(<<~RUBY) foo(a: 1) RUBY end puts "Number of live objects: #{GC.stat(:heap_live_slots)}" puts "Memory usage: #{`ps -o rss= -p #{$$}`}" puts end ``` Output is: ``` Number of live objects: 46248 Memory usage: 16160 Number of live objects: 65902 Memory usage: 19888 Number of live objects: 92656 Memory usage: 24032 Number of live objects: 126791 Memory usage: 28048 Number of live objects: 132919 Memory usage: 28816 Number of live objects: 180687 Memory usage: 32384 Number of live objects: 181957 Memory usage: 32464 Number of live objects: 227485 Memory usage: 34224 Number of live objects: 256101 Memory usage: 37200 Number of live objects: 274151 Memory usage: 38752 ``` After performing a `ObjectSpace.dump_all`, I found that it is leaking callcache and callinfo objects that is being held on by the `Object` class. ```json {"address":"0x102ecef70", "type":"CLASS", "shape_id":2, "slot_size":160, "class":"0x102ecf8d0", "variation_count":0, "superclass":"0x102ecfd30", "real_class_name":"Object", "singleton":true, "references":[ ... ]} {"address":"0x1030c90a0", "type":"IMEMO", "shape_id":0, "slot_size":40, "imemo_type":"callinfo", "mid":"foo", "memsize":40, "flags":{"wb_protected":true}} {"address":"0x102fad568", "type":"IMEMO", "shape_id":0, "slot_size":40, "imemo_type":"callcache", "memsize":40, "flags":{"wb_protected":true, "old":true, "uncollectible":true, "marked":true}} ``` -- https://bugs.ruby-lang.org/

Issue #19907 has been updated by naruse (Yui NARUSE). Backport changed from 3.0: WONTFIX, 3.1: REQUIRED, 3.2: REQUIRED, 3.3: REQUIRED to 3.0: WONTFIX, 3.1: REQUIRED, 3.2: REQUIRED, 3.3: DONE ruby_3_3 57a0afe2090b8d05673d650b1e8bf9ae67449b1f merged revision(s) 081ee3d35509110f383cb7dd8d1205def0cdd1e8,1c97abaabae6844c861705fd07f532292dcffa74. ---------------------------------------- Bug #19907: Method calls with keyword arguments in eval leaks callcache and callinfo objects https://bugs.ruby-lang.org/issues/19907#change-107403 * Author: peterzhu2118 (Peter Zhu) * Status: Closed * Backport: 3.0: WONTFIX, 3.1: REQUIRED, 3.2: REQUIRED, 3.3: DONE ---------------------------------------- The following script leaks callcache and callinfo objects: ```ruby def foo(a:); end 10.times do 10_000.times do eval(<<~RUBY) foo(a: 1) RUBY end puts "Number of live objects: #{GC.stat(:heap_live_slots)}" puts "Memory usage: #{`ps -o rss= -p #{$$}`}" puts end ``` Output is: ``` Number of live objects: 46248 Memory usage: 16160 Number of live objects: 65902 Memory usage: 19888 Number of live objects: 92656 Memory usage: 24032 Number of live objects: 126791 Memory usage: 28048 Number of live objects: 132919 Memory usage: 28816 Number of live objects: 180687 Memory usage: 32384 Number of live objects: 181957 Memory usage: 32464 Number of live objects: 227485 Memory usage: 34224 Number of live objects: 256101 Memory usage: 37200 Number of live objects: 274151 Memory usage: 38752 ``` After performing a `ObjectSpace.dump_all`, I found that it is leaking callcache and callinfo objects that is being held on by the `Object` class. ```json {"address":"0x102ecef70", "type":"CLASS", "shape_id":2, "slot_size":160, "class":"0x102ecf8d0", "variation_count":0, "superclass":"0x102ecfd30", "real_class_name":"Object", "singleton":true, "references":[ ... ]} {"address":"0x1030c90a0", "type":"IMEMO", "shape_id":0, "slot_size":40, "imemo_type":"callinfo", "mid":"foo", "memsize":40, "flags":{"wb_protected":true}} {"address":"0x102fad568", "type":"IMEMO", "shape_id":0, "slot_size":40, "imemo_type":"callcache", "memsize":40, "flags":{"wb_protected":true, "old":true, "uncollectible":true, "marked":true}} ``` -- https://bugs.ruby-lang.org/