[#101179] Spectre Mitigations — Amel <amel.smajic@...>
Hi there!
5 messages
2020/12/01
[#101180] Re: Spectre Mitigations
— Chris Seaton <chris@...>
2020/12/01
I wouldn’t recommend using Ruby to run in-process untrusted code in the first place. Are people doing that?
[#101694] Ruby 3.0.0 Released — "NARUSE, Yui" <naruse@...>
We are pleased to announce the release of Ruby 3.0.0. From 2015 we
4 messages
2020/12/25
[ruby-core:101329] [Ruby master Bug#17373] Ruby 3.0 is slower at Discourse bench than Ruby 2.7
From:
sam.saffron@...
Date:
2020-12-09 05:41:23 UTC
List:
ruby-core #101329
Issue #17373 has been updated by sam.saffron (Sam Saffron).
I made this tiny script, which you can use to test (in the branch in the first post)
```
#!/usr/bin/env ruby
# frozen_string_literal: true
ENV['RAILS_ENV'] = 'profile'
require File.expand_path("../../config/environment", __FILE__)
def make_request
req = {
"REQUEST_METHOD" => "GET",
"SCRIPT_NAME" => "",
"PATH_INFO" => "/",
"QUERY_STRING" => "",
"SERVER_NAME" => "127.0.0.1",
"SERVER_PORT" => "80",
"REQUEST_PATH" => "/",
"REMOTE_ADDR" => "127.0.0.1",
"HTTP_VERSION" => "HTTP/1.0",
"rack.input" => StringIO.new(""),
"rack.version" => [1, 2],
"rack.url_scheme" => "http"
}
Rails.application.call(req)
end
10.times do
make_request
end
3.times do
GC.start(full_mark: true, immediate_sweep: true)
end
start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
RubyVM.reset_debug_counters
make_request
RubyVM.show_debug_counters
elapsed = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start
puts "Duration was #{elapsed}"
gets
```
Results for 2.7 are:
```
[RUBY_DEBUG_COUNTER] 417420 method call
[RUBY_DEBUG_COUNTER] mc_inline_hit 407,308
[RUBY_DEBUG_COUNTER] mc_inline_miss 17,502
[RUBY_DEBUG_COUNTER] mc_global_hit 86,554
[RUBY_DEBUG_COUNTER] mc_global_miss 207
[RUBY_DEBUG_COUNTER] mc_global_state_miss 2,762
[RUBY_DEBUG_COUNTER] mc_class_serial_miss 14,740
[RUBY_DEBUG_COUNTER] mc_cme_complement 10,191
[RUBY_DEBUG_COUNTER] mc_cme_complement_hit 10,191
[RUBY_DEBUG_COUNTER] mc_search_super 2,770
[RUBY_DEBUG_COUNTER] mc_miss_by_nome 0
[RUBY_DEBUG_COUNTER] mc_miss_by_distinct 10,348
[RUBY_DEBUG_COUNTER] mc_miss_by_refine 0
[RUBY_DEBUG_COUNTER] mc_miss_by_visi 218
[RUBY_DEBUG_COUNTER] mc_miss_spurious 6,936
[RUBY_DEBUG_COUNTER] mc_miss_reuse_call 2,245
[RUBY_DEBUG_COUNTER] ccf_general 16,704
[RUBY_DEBUG_COUNTER] ccf_iseq_setup 43,129
[RUBY_DEBUG_COUNTER] ccf_iseq_setup_0start 1,055
[RUBY_DEBUG_COUNTER] ccf_iseq_setup_tailcall_0start 0
[RUBY_DEBUG_COUNTER] ccf_iseq_fix 134,778
[RUBY_DEBUG_COUNTER] ccf_iseq_opt 14,039
[RUBY_DEBUG_COUNTER] ccf_iseq_kw1 124
[RUBY_DEBUG_COUNTER] ccf_iseq_kw2 195
[RUBY_DEBUG_COUNTER] ccf_cfunc 139,250
[RUBY_DEBUG_COUNTER] ccf_ivar 51,208
[RUBY_DEBUG_COUNTER] ccf_attrset 698
[RUBY_DEBUG_COUNTER] ccf_method_missing 524
[RUBY_DEBUG_COUNTER] ccf_zsuper 0
[RUBY_DEBUG_COUNTER] ccf_bmethod 18,238
[RUBY_DEBUG_COUNTER] ccf_opt_send 8,025
[RUBY_DEBUG_COUNTER] ccf_opt_call 857
[RUBY_DEBUG_COUNTER] ccf_opt_block_call 0
[RUBY_DEBUG_COUNTER] ccf_super_method 13,155
[RUBY_DEBUG_COUNTER] frame_push 392,112
[RUBY_DEBUG_COUNTER] frame_push_method 193,320
[RUBY_DEBUG_COUNTER] frame_push_block 35,436
[RUBY_DEBUG_COUNTER] frame_push_class 0
[RUBY_DEBUG_COUNTER] frame_push_top 0
[RUBY_DEBUG_COUNTER] frame_push_cfunc 159,590
[RUBY_DEBUG_COUNTER] frame_push_ifunc 3,764
[RUBY_DEBUG_COUNTER] frame_push_eval 0
[RUBY_DEBUG_COUNTER] frame_push_rescue 2
[RUBY_DEBUG_COUNTER] frame_push_dummy 0
[RUBY_DEBUG_COUNTER] frame_R2R 204,735
[RUBY_DEBUG_COUNTER] frame_R2C 148,739
[RUBY_DEBUG_COUNTER] frame_C2C 14,615
[RUBY_DEBUG_COUNTER] frame_C2R 24,023
[RUBY_DEBUG_COUNTER] ivar_get_ic_hit 105,173
[RUBY_DEBUG_COUNTER] ivar_get_ic_miss 20,240
[RUBY_DEBUG_COUNTER] ivar_get_ic_miss_serial 28,221
[RUBY_DEBUG_COUNTER] ivar_get_ic_miss_unset 11,963
[RUBY_DEBUG_COUNTER] ivar_get_ic_miss_noobject 0
[RUBY_DEBUG_COUNTER] ivar_set_ic_hit 10,802
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss 13,473
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss_serial 8,262
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss_unset 4
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss_oorange 3,924
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss_noobject 1,283
[RUBY_DEBUG_COUNTER] ivar_get_base 21,572
[RUBY_DEBUG_COUNTER] ivar_set_base 13,494
[RUBY_DEBUG_COUNTER] lvar_get 355,050
[RUBY_DEBUG_COUNTER] lvar_get_dynamic 40,160
[RUBY_DEBUG_COUNTER] lvar_set 78,325
[RUBY_DEBUG_COUNTER] lvar_set_dynamic 1,252
[RUBY_DEBUG_COUNTER] lvar_set_slowpath 101
[RUBY_DEBUG_COUNTER] gc_count 0
[RUBY_DEBUG_COUNTER] gc_minor_newobj 0
[RUBY_DEBUG_COUNTER] gc_minor_malloc 0
[RUBY_DEBUG_COUNTER] gc_minor_method 0
[RUBY_DEBUG_COUNTER] gc_minor_capi 0
[RUBY_DEBUG_COUNTER] gc_minor_stress 0
[RUBY_DEBUG_COUNTER] gc_major_nofree 0
[RUBY_DEBUG_COUNTER] gc_major_oldgen 0
[RUBY_DEBUG_COUNTER] gc_major_shady 0
[RUBY_DEBUG_COUNTER] gc_major_force 0
[RUBY_DEBUG_COUNTER] gc_major_oldmalloc 0
[RUBY_DEBUG_COUNTER] gc_isptr_trial 0
[RUBY_DEBUG_COUNTER] gc_isptr_range 0
[RUBY_DEBUG_COUNTER] gc_isptr_align 0
[RUBY_DEBUG_COUNTER] gc_isptr_maybe 0
[RUBY_DEBUG_COUNTER] obj_newobj 58,178
[RUBY_DEBUG_COUNTER] obj_newobj_slowpath 1,517
[RUBY_DEBUG_COUNTER] obj_newobj_wb_unprotected 877
[RUBY_DEBUG_COUNTER] obj_free 0
[RUBY_DEBUG_COUNTER] obj_promote 0
[RUBY_DEBUG_COUNTER] obj_wb_unprotect 0
[RUBY_DEBUG_COUNTER] obj_obj_embed 0
[RUBY_DEBUG_COUNTER] obj_obj_transient 0
[RUBY_DEBUG_COUNTER] obj_obj_ptr 0
[RUBY_DEBUG_COUNTER] obj_str_ptr 0
[RUBY_DEBUG_COUNTER] obj_str_embed 0
[RUBY_DEBUG_COUNTER] obj_str_shared 0
[RUBY_DEBUG_COUNTER] obj_str_nofree 0
[RUBY_DEBUG_COUNTER] obj_str_fstr 0
[RUBY_DEBUG_COUNTER] obj_ary_embed 0
[RUBY_DEBUG_COUNTER] obj_ary_transient 0
[RUBY_DEBUG_COUNTER] obj_ary_ptr 1
[RUBY_DEBUG_COUNTER] obj_ary_extracapa 0
[RUBY_DEBUG_COUNTER] obj_ary_shared_create 81
[RUBY_DEBUG_COUNTER] obj_ary_shared 0
[RUBY_DEBUG_COUNTER] obj_ary_shared_root_occupied 0
[RUBY_DEBUG_COUNTER] obj_hash_empty 0
[RUBY_DEBUG_COUNTER] obj_hash_1 0
[RUBY_DEBUG_COUNTER] obj_hash_2 0
[RUBY_DEBUG_COUNTER] obj_hash_3 0
[RUBY_DEBUG_COUNTER] obj_hash_4 0
[RUBY_DEBUG_COUNTER] obj_hash_5_8 0
[RUBY_DEBUG_COUNTER] obj_hash_g8 0
[RUBY_DEBUG_COUNTER] obj_hash_null 0
[RUBY_DEBUG_COUNTER] obj_hash_ar 0
[RUBY_DEBUG_COUNTER] obj_hash_st 0
[RUBY_DEBUG_COUNTER] obj_hash_transient 0
[RUBY_DEBUG_COUNTER] obj_hash_force_convert 0
[RUBY_DEBUG_COUNTER] obj_struct_embed 0
[RUBY_DEBUG_COUNTER] obj_struct_transient 0
[RUBY_DEBUG_COUNTER] obj_struct_ptr 0
[RUBY_DEBUG_COUNTER] obj_data_empty 0
[RUBY_DEBUG_COUNTER] obj_data_xfree 0
[RUBY_DEBUG_COUNTER] obj_data_imm_free 0
[RUBY_DEBUG_COUNTER] obj_data_zombie 0
[RUBY_DEBUG_COUNTER] obj_match_under4 0
[RUBY_DEBUG_COUNTER] obj_match_ge4 0
[RUBY_DEBUG_COUNTER] obj_match_ge8 0
[RUBY_DEBUG_COUNTER] obj_match_ptr 0
[RUBY_DEBUG_COUNTER] obj_iclass_ptr 0
[RUBY_DEBUG_COUNTER] obj_class_ptr 0
[RUBY_DEBUG_COUNTER] obj_module_ptr 0
[RUBY_DEBUG_COUNTER] obj_bignum_ptr 0
[RUBY_DEBUG_COUNTER] obj_bignum_embed 0
[RUBY_DEBUG_COUNTER] obj_float 0
[RUBY_DEBUG_COUNTER] obj_complex 0
[RUBY_DEBUG_COUNTER] obj_rational 0
[RUBY_DEBUG_COUNTER] obj_regexp_ptr 0
[RUBY_DEBUG_COUNTER] obj_file_ptr 0
[RUBY_DEBUG_COUNTER] obj_symbol 0
[RUBY_DEBUG_COUNTER] obj_imemo_ment 0
[RUBY_DEBUG_COUNTER] obj_imemo_iseq 0
[RUBY_DEBUG_COUNTER] obj_imemo_env 0
[RUBY_DEBUG_COUNTER] obj_imemo_tmpbuf 0
[RUBY_DEBUG_COUNTER] obj_imemo_ast 0
[RUBY_DEBUG_COUNTER] obj_imemo_cref 0
[RUBY_DEBUG_COUNTER] obj_imemo_svar 0
[RUBY_DEBUG_COUNTER] obj_imemo_throw_data 0
[RUBY_DEBUG_COUNTER] obj_imemo_ifunc 0
[RUBY_DEBUG_COUNTER] obj_imemo_memo 0
[RUBY_DEBUG_COUNTER] obj_imemo_parser_strterm 0
[RUBY_DEBUG_COUNTER] artable_hint_hit 23,024
[RUBY_DEBUG_COUNTER] artable_hint_miss 174
[RUBY_DEBUG_COUNTER] artable_hint_notfound 27,875
[RUBY_DEBUG_COUNTER] heap_xmalloc 7,642
[RUBY_DEBUG_COUNTER] heap_xrealloc 153
[RUBY_DEBUG_COUNTER] heap_xfree 539
[RUBY_DEBUG_COUNTER] theap_alloc 9,295
[RUBY_DEBUG_COUNTER] theap_alloc_fail 0
[RUBY_DEBUG_COUNTER] theap_evacuate 0
[RUBY_DEBUG_COUNTER] mjit_exec 0
[RUBY_DEBUG_COUNTER] mjit_exec_not_added 0
[RUBY_DEBUG_COUNTER] mjit_exec_not_added_add_iseq 0
[RUBY_DEBUG_COUNTER] mjit_exec_not_ready 0
[RUBY_DEBUG_COUNTER] mjit_exec_not_compiled 0
[RUBY_DEBUG_COUNTER] mjit_exec_call_func 0
[RUBY_DEBUG_COUNTER] mjit_frame_VM2VM 0
[RUBY_DEBUG_COUNTER] mjit_frame_VM2JT 0
[RUBY_DEBUG_COUNTER] mjit_frame_JT2JT 0
[RUBY_DEBUG_COUNTER] mjit_frame_JT2VM 0
[RUBY_DEBUG_COUNTER] mjit_cancel 0
[RUBY_DEBUG_COUNTER] mjit_cancel_ivar_inline 0
[RUBY_DEBUG_COUNTER] mjit_cancel_send_inline 0
[RUBY_DEBUG_COUNTER] mjit_cancel_opt_insn 0
[RUBY_DEBUG_COUNTER] mjit_cancel_invalidate_all 0
[RUBY_DEBUG_COUNTER] mjit_length_unit_queue 0
[RUBY_DEBUG_COUNTER] mjit_length_active_units 0
[RUBY_DEBUG_COUNTER] mjit_length_compact_units 0
[RUBY_DEBUG_COUNTER] mjit_length_stale_units 0
[RUBY_DEBUG_COUNTER] mjit_compile_failures 0
```
Results for 3.0 are:
```
[RUBY_DEBUG_COUNTER] 417140 show_debug_counters
[RUBY_DEBUG_COUNTER] mc_inline_hit 383,937
[RUBY_DEBUG_COUNTER] mc_inline_miss_klass 37,470
[RUBY_DEBUG_COUNTER] mc_inline_miss_invalidated 0
[RUBY_DEBUG_COUNTER] mc_cme_complement 166
[RUBY_DEBUG_COUNTER] mc_cme_complement_hit 166
[RUBY_DEBUG_COUNTER] mc_search 7,248
[RUBY_DEBUG_COUNTER] mc_search_notfound 4,254
[RUBY_DEBUG_COUNTER] mc_search_super 107,104
[RUBY_DEBUG_COUNTER] obj_respond_to 613
[RUBY_DEBUG_COUNTER] ci_packed 13,043
[RUBY_DEBUG_COUNTER] ci_kw 0
[RUBY_DEBUG_COUNTER] ci_nokw 0
[RUBY_DEBUG_COUNTER] ci_runtime 13,043
[RUBY_DEBUG_COUNTER] cc_new 228
[RUBY_DEBUG_COUNTER] cc_temp 0
[RUBY_DEBUG_COUNTER] cc_found_ccs 36,718
[RUBY_DEBUG_COUNTER] cc_ent_invalidate 0
[RUBY_DEBUG_COUNTER] cc_cme_invalidate 0
[RUBY_DEBUG_COUNTER] cc_invalidate_leaf 0
[RUBY_DEBUG_COUNTER] cc_invalidate_leaf_ccs 0
[RUBY_DEBUG_COUNTER] cc_invalidate_leaf_callable 0
[RUBY_DEBUG_COUNTER] cc_invalidate_tree 0
[RUBY_DEBUG_COUNTER] cc_invalidate_tree_cme 0
[RUBY_DEBUG_COUNTER] cc_invalidate_tree_callable 0
[RUBY_DEBUG_COUNTER] ccs_free 0
[RUBY_DEBUG_COUNTER] ccs_maxlen 2
[RUBY_DEBUG_COUNTER] ccs_found 57,960
[RUBY_DEBUG_COUNTER] iseq_num 0
[RUBY_DEBUG_COUNTER] iseq_cd_num 0
[RUBY_DEBUG_COUNTER] ccf_general 11,291
[RUBY_DEBUG_COUNTER] ccf_iseq_setup 36,053
[RUBY_DEBUG_COUNTER] ccf_iseq_setup_0start 1,068
[RUBY_DEBUG_COUNTER] ccf_iseq_setup_tailcall_0start 0
[RUBY_DEBUG_COUNTER] ccf_iseq_fix 154,419
[RUBY_DEBUG_COUNTER] ccf_iseq_opt 16,076
[RUBY_DEBUG_COUNTER] ccf_iseq_kw1 124
[RUBY_DEBUG_COUNTER] ccf_iseq_kw2 231
[RUBY_DEBUG_COUNTER] ccf_cfunc 1,878
[RUBY_DEBUG_COUNTER] ccf_cfunc_with_frame 123,495
[RUBY_DEBUG_COUNTER] ccf_ivar 51,189
[RUBY_DEBUG_COUNTER] ccf_attrset 698
[RUBY_DEBUG_COUNTER] ccf_method_missing 524
[RUBY_DEBUG_COUNTER] ccf_zsuper 0
[RUBY_DEBUG_COUNTER] ccf_bmethod 18,238
[RUBY_DEBUG_COUNTER] ccf_opt_send 8,025
[RUBY_DEBUG_COUNTER] ccf_opt_call 857
[RUBY_DEBUG_COUNTER] ccf_opt_block_call 0
[RUBY_DEBUG_COUNTER] ccf_super_method 32
[RUBY_DEBUG_COUNTER] frame_push 390,819
[RUBY_DEBUG_COUNTER] frame_push_method 207,971
[RUBY_DEBUG_COUNTER] frame_push_block 35,437
[RUBY_DEBUG_COUNTER] frame_push_class 0
[RUBY_DEBUG_COUNTER] frame_push_top 0
[RUBY_DEBUG_COUNTER] frame_push_cfunc 143,645
[RUBY_DEBUG_COUNTER] frame_push_ifunc 3,764
[RUBY_DEBUG_COUNTER] frame_push_eval 0
[RUBY_DEBUG_COUNTER] frame_push_rescue 2
[RUBY_DEBUG_COUNTER] frame_push_dummy 0
[RUBY_DEBUG_COUNTER] frame_R2R 219,554
[RUBY_DEBUG_COUNTER] frame_R2C 132,840
[RUBY_DEBUG_COUNTER] frame_C2C 14,569
[RUBY_DEBUG_COUNTER] frame_C2R 23,856
[RUBY_DEBUG_COUNTER] ivar_get_ic_hit 106,326
[RUBY_DEBUG_COUNTER] ivar_get_ic_miss 20,239
[RUBY_DEBUG_COUNTER] ivar_get_ic_miss_serial 27,800
[RUBY_DEBUG_COUNTER] ivar_get_ic_miss_unset 10,739
[RUBY_DEBUG_COUNTER] ivar_get_ic_miss_noobject 0
[RUBY_DEBUG_COUNTER] ivar_set_ic_hit 17,837
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss 1,283
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss_serial 5,148
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss_unset 7
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss_iv_hit 5,155
[RUBY_DEBUG_COUNTER] ivar_set_ic_miss_noobject 1,283
[RUBY_DEBUG_COUNTER] ivar_get_base 21,570
[RUBY_DEBUG_COUNTER] ivar_set_base 1,304
[RUBY_DEBUG_COUNTER] lvar_get 354,236
[RUBY_DEBUG_COUNTER] lvar_get_dynamic 40,161
[RUBY_DEBUG_COUNTER] lvar_set 78,173
[RUBY_DEBUG_COUNTER] lvar_set_dynamic 1,252
[RUBY_DEBUG_COUNTER] lvar_set_slowpath 101
[RUBY_DEBUG_COUNTER] gc_count 0
[RUBY_DEBUG_COUNTER] gc_minor_newobj 0
[RUBY_DEBUG_COUNTER] gc_minor_malloc 0
[RUBY_DEBUG_COUNTER] gc_minor_method 0
[RUBY_DEBUG_COUNTER] gc_minor_capi 0
[RUBY_DEBUG_COUNTER] gc_minor_stress 0
[RUBY_DEBUG_COUNTER] gc_major_nofree 0
[RUBY_DEBUG_COUNTER] gc_major_oldgen 0
[RUBY_DEBUG_COUNTER] gc_major_shady 0
[RUBY_DEBUG_COUNTER] gc_major_force 0
[RUBY_DEBUG_COUNTER] gc_major_oldmalloc 0
[RUBY_DEBUG_COUNTER] gc_isptr_trial 0
[RUBY_DEBUG_COUNTER] gc_isptr_range 0
[RUBY_DEBUG_COUNTER] gc_isptr_align 0
[RUBY_DEBUG_COUNTER] gc_isptr_maybe 0
[RUBY_DEBUG_COUNTER] obj_newobj 57,746
[RUBY_DEBUG_COUNTER] obj_newobj_slowpath 873
[RUBY_DEBUG_COUNTER] obj_newobj_wb_unprotected 733
[RUBY_DEBUG_COUNTER] obj_free 0
[RUBY_DEBUG_COUNTER] obj_promote 0
[RUBY_DEBUG_COUNTER] obj_wb_unprotect 0
[RUBY_DEBUG_COUNTER] obj_obj_embed 0
[RUBY_DEBUG_COUNTER] obj_obj_transient 0
[RUBY_DEBUG_COUNTER] obj_obj_ptr 0
[RUBY_DEBUG_COUNTER] obj_str_ptr 0
[RUBY_DEBUG_COUNTER] obj_str_embed 0
[RUBY_DEBUG_COUNTER] obj_str_shared 0
[RUBY_DEBUG_COUNTER] obj_str_nofree 0
[RUBY_DEBUG_COUNTER] obj_str_fstr 0
[RUBY_DEBUG_COUNTER] obj_ary_embed 0
[RUBY_DEBUG_COUNTER] obj_ary_transient 0
[RUBY_DEBUG_COUNTER] obj_ary_ptr 1
[RUBY_DEBUG_COUNTER] obj_ary_extracapa 0
[RUBY_DEBUG_COUNTER] obj_ary_shared_create 81
[RUBY_DEBUG_COUNTER] obj_ary_shared 0
[RUBY_DEBUG_COUNTER] obj_ary_shared_root_occupied 0
[RUBY_DEBUG_COUNTER] obj_hash_empty 0
[RUBY_DEBUG_COUNTER] obj_hash_1 0
[RUBY_DEBUG_COUNTER] obj_hash_2 0
[RUBY_DEBUG_COUNTER] obj_hash_3 0
[RUBY_DEBUG_COUNTER] obj_hash_4 0
[RUBY_DEBUG_COUNTER] obj_hash_5_8 0
[RUBY_DEBUG_COUNTER] obj_hash_g8 0
[RUBY_DEBUG_COUNTER] obj_hash_null 0
[RUBY_DEBUG_COUNTER] obj_hash_ar 0
[RUBY_DEBUG_COUNTER] obj_hash_st 0
[RUBY_DEBUG_COUNTER] obj_hash_transient 0
[RUBY_DEBUG_COUNTER] obj_hash_force_convert 0
[RUBY_DEBUG_COUNTER] obj_struct_embed 0
[RUBY_DEBUG_COUNTER] obj_struct_transient 0
[RUBY_DEBUG_COUNTER] obj_struct_ptr 0
[RUBY_DEBUG_COUNTER] obj_data_empty 0
[RUBY_DEBUG_COUNTER] obj_data_xfree 0
[RUBY_DEBUG_COUNTER] obj_data_imm_free 0
[RUBY_DEBUG_COUNTER] obj_data_zombie 0
[RUBY_DEBUG_COUNTER] obj_match_under4 0
[RUBY_DEBUG_COUNTER] obj_match_ge4 0
[RUBY_DEBUG_COUNTER] obj_match_ge8 0
[RUBY_DEBUG_COUNTER] obj_match_ptr 0
[RUBY_DEBUG_COUNTER] obj_iclass_ptr 0
[RUBY_DEBUG_COUNTER] obj_class_ptr 0
[RUBY_DEBUG_COUNTER] obj_module_ptr 0
[RUBY_DEBUG_COUNTER] obj_bignum_ptr 0
[RUBY_DEBUG_COUNTER] obj_bignum_embed 0
[RUBY_DEBUG_COUNTER] obj_float 0
[RUBY_DEBUG_COUNTER] obj_complex 0
[RUBY_DEBUG_COUNTER] obj_rational 0
[RUBY_DEBUG_COUNTER] obj_regexp_ptr 0
[RUBY_DEBUG_COUNTER] obj_file_ptr 0
[RUBY_DEBUG_COUNTER] obj_symbol 0
[RUBY_DEBUG_COUNTER] obj_imemo_ment 0
[RUBY_DEBUG_COUNTER] obj_imemo_iseq 0
[RUBY_DEBUG_COUNTER] obj_imemo_env 0
[RUBY_DEBUG_COUNTER] obj_imemo_tmpbuf 0
[RUBY_DEBUG_COUNTER] obj_imemo_ast 0
[RUBY_DEBUG_COUNTER] obj_imemo_cref 0
[RUBY_DEBUG_COUNTER] obj_imemo_svar 0
[RUBY_DEBUG_COUNTER] obj_imemo_throw_data 0
[RUBY_DEBUG_COUNTER] obj_imemo_ifunc 0
[RUBY_DEBUG_COUNTER] obj_imemo_memo 0
[RUBY_DEBUG_COUNTER] obj_imemo_parser_strterm 0
[RUBY_DEBUG_COUNTER] obj_imemo_callinfo 0
[RUBY_DEBUG_COUNTER] obj_imemo_callcache 0
[RUBY_DEBUG_COUNTER] artable_hint_hit 22,575
[RUBY_DEBUG_COUNTER] artable_hint_miss 70
[RUBY_DEBUG_COUNTER] artable_hint_notfound 27,631
[RUBY_DEBUG_COUNTER] heap_xmalloc 6,942
[RUBY_DEBUG_COUNTER] heap_xrealloc 987
[RUBY_DEBUG_COUNTER] heap_xfree 423
[RUBY_DEBUG_COUNTER] theap_alloc 7,715
[RUBY_DEBUG_COUNTER] theap_alloc_fail 0
[RUBY_DEBUG_COUNTER] theap_evacuate 0
[RUBY_DEBUG_COUNTER] mjit_exec 0
[RUBY_DEBUG_COUNTER] mjit_exec_not_added 0
[RUBY_DEBUG_COUNTER] mjit_exec_not_ready 0
[RUBY_DEBUG_COUNTER] mjit_exec_not_compiled 0
[RUBY_DEBUG_COUNTER] mjit_exec_call_func 0
[RUBY_DEBUG_COUNTER] mjit_add_iseq_to_process 0
[RUBY_DEBUG_COUNTER] mjit_unload_units 0
[RUBY_DEBUG_COUNTER] mjit_frame_VM2VM 0
[RUBY_DEBUG_COUNTER] mjit_frame_VM2JT 0
[RUBY_DEBUG_COUNTER] mjit_frame_JT2JT 0
[RUBY_DEBUG_COUNTER] mjit_frame_JT2VM 0
[RUBY_DEBUG_COUNTER] mjit_cancel 0
[RUBY_DEBUG_COUNTER] mjit_cancel_ivar_inline 0
[RUBY_DEBUG_COUNTER] mjit_cancel_exivar_inline 0
[RUBY_DEBUG_COUNTER] mjit_cancel_send_inline 0
[RUBY_DEBUG_COUNTER] mjit_cancel_opt_insn 0
[RUBY_DEBUG_COUNTER] mjit_cancel_invalidate_all 0
[RUBY_DEBUG_COUNTER] mjit_cancel_leave 0
[RUBY_DEBUG_COUNTER] mjit_length_unit_queue 0
[RUBY_DEBUG_COUNTER] mjit_length_active_units 0
[RUBY_DEBUG_COUNTER] mjit_length_compact_units 0
[RUBY_DEBUG_COUNTER] mjit_length_stale_units 0
[RUBY_DEBUG_COUNTER] mjit_compile_failures 0
```
I patched Ruby to also count obj_respond_to calls.
This is our "profile mode" home page, it takes about 40ms or so and is very typical of Rails performance.
A single page will issue 613 obj_respond_to calls, I guess this is not properly cached.
You can run it by running Discourse bench on 2.7 (which will prep the DB) then execute the script.
----------------------------------------
Bug #17373: Ruby 3.0 is slower at Discourse bench than Ruby 2.7
https://bugs.ruby-lang.org/issues/17373#change-89027
* Author: sam.saffron (Sam Saffron)
* Status: Open
* Priority: Normal
* ruby -v: 3.0
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
We have a continuous effort to keep https://rubybench.org/ up to date. Unfortunately we have lapsed a bit on updates so I decided to run Discourse bench by hand.
On my local system I am noticing the timing are much slower on Discourse bench than they were on Ruby 2.7:
```
98c9120cc00ba691b4abcc13a49a30fa54638535
---
categories:
50: 34
75: 35
90: 36
99: 40
home:
50: 47
75: 50
90: 56
99: 92
topic:
50: 53
75: 55
90: 58
99: 92
categories_admin:
50: 33
75: 34
90: 38
99: 68
home_admin:
50: 45
75: 47
90: 51
99: 95
topic_admin:
50: 51
75: 52
90: 54
99: 59
timings:
load_rails: 1449
ruby-version: 3.0.0-p-1
rss_kb: 293808
pss_kb: 284244
2.7.2
---
categories:
50: 29
75: 30
90: 33
99: 43
home:
50: 42
75: 43
90: 47
99: 73
topic:
50: 47
75: 47
90: 52
99: 54
categories_admin:
50: 30
75: 31
90: 36
99: 56
home_admin:
50: 41
75: 43
90: 48
99: 71
topic_admin:
50: 47
75: 48
90: 52
99: 55
timings:
load_rails: 1339
ruby-version: 2.7.2-p137
rss_kb: 296836
pss_kb: 287310
2.6.6
---
categories:
50: 30
75: 30
90: 31
99: 51
home:
50: 40
75: 42
90: 60
99: 79
topic:
50: 47
75: 48
90: 53
99: 71
categories_admin:
50: 30
75: 31
90: 35
99: 50
home_admin:
50: 41
75: 43
90: 62
99: 100
topic_admin:
50: 48
75: 49
90: 65
99: 93
timings:
load_rails: 1464
ruby-version: 2.6.6-p146
rss_kb: 332268
pss_kb: 322865
```
Concretely this means a typical "homepage" view is taking 47 milliseconds now, when in the past it was taking 42 or even 40 ms.
There may be some issues with the bench, you can see it here:
https://github.com/discourse/discourse/tree/ruby-3
The script to run the bench is `ruby script/bench.rb`
I re-tested against a cleanly built Ruby 2.7 direct from the Git branch to ensure compilation was not at fault.
This is pretty concerning, Discourse bench usually tracks Rails performance pretty accurately.
---Files--------------------------------
aaron — perf _home_aaron_git_railsbench — ssh whiteclaw.local — 175×54 2020-12-07 12-41-12.png (842 KB)
aaron — perf _home_aaron_git_railsbench — ssh whiteclaw.local — 175×54 2020-12-07 12-41-58.png (874 KB)
aaron — perf _home_aaron_git_railsbench — ssh whiteclaw.local — 299×65 2020-12-07 13-19-20.png (142 KB)
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