Open myrrc opened 2 months ago
LTO allows to eliminate dead code sections.
Why this may be useful, clap example. Release build:
~/src/dexed bloaty build/Source/Dexed_artefacts/CLAP/Dexed.clap FILE SIZE VM SIZE -------------- -------------- 34.1% 6.96Mi 0.0% 0 .strtab 30.5% 6.22Mi 54.0% 6.22Mi .text 9.7% 1.97Mi 0.0% 0 .symtab 9.4% 1.91Mi 16.6% 1.91Mi .eh_frame 8.4% 1.72Mi 14.9% 1.72Mi .rodata 3.1% 655Ki 5.6% 655Ki .rela.dyn 2.3% 476Ki 4.0% 476Ki .eh_frame_hdr 1.5% 319Ki 2.7% 319Ki .data.rel.ro 0.5% 109Ki 0.9% 109Ki .gcc_except_table 0.0% 0 0.5% 62.6Ki .bss 0.2% 33.8Ki 0.3% 33.8Ki .dynstr 0.1% 16.8Ki 0.1% 16.8Ki .dynsym 0.1% 13.7Ki 0.1% 13.7Ki .rela.plt 0.0% 9.12Ki 0.1% 9.12Ki .plt 0.0% 6.76Ki 0.1% 6.76Ki .data 0.0% 4.59Ki 0.0% 4.59Ki .got.plt 0.0% 2.96Ki 0.0% 2.69Ki [14 Others] 0.0% 2.72Ki 0.0% 0 [Unmapped] 0.0% 1.88Ki 0.0% 0 [ELF Section Headers] 0.0% 1.55Ki 0.0% 1.55Ki .gnu.hash 0.0% 1.41Ki 0.0% 1.41Ki .gnu.version 100.0% 20.4Mi 100.0% 11.5Mi TOTAL
Release build with LTO:
~/src/dexed bloaty build/Source/Dexed_artefacts/CLAP/Dexed.clap FILE SIZE VM SIZE -------------- -------------- 47.0% 2.47Mi 56.6% 2.47Mi .text 19.9% 1.05Mi 24.0% 1.05Mi .rodata 12.5% 670Ki 0.0% 0 .strtab 5.6% 299Ki 6.7% 299Ki .eh_frame 5.4% 292Ki 0.0% 0 .symtab 5.1% 273Ki 6.1% 273Ki .rela.dyn 1.4% 77.9Ki 1.7% 77.9Ki .data.rel.ro.local 0.0% 0 1.3% 60.1Ki .bss 0.9% 49.5Ki 1.1% 49.5Ki .eh_frame_hdr 0.9% 47.5Ki 1.1% 47.5Ki .gcc_except_table 0.4% 21.1Ki 0.5% 21.1Ki .data.rel.ro 0.2% 9.97Ki 0.2% 9.97Ki .dynstr 0.2% 9.35Ki 0.2% 9.35Ki .dynsym 0.1% 7.15Ki 0.2% 7.15Ki .rela.plt 0.1% 4.78Ki 0.1% 4.78Ki .plt 0.1% 2.94Ki 0.1% 2.54Ki [16 Others] 0.1% 2.93Ki 0.1% 2.94Ki .data 0.0% 2.41Ki 0.1% 2.41Ki .got.plt 0.0% 2.06Ki 0.0% 0 [ELF Section Headers] 0.0% 1.70Ki 0.0% 0 [Unmapped] 0.0% 800 0.0% 800 .gnu.version 100.0% 5.25Mi 100.0% 4.37Mi TOTAL
LTO allows to eliminate dead code sections.
Why this may be useful, clap example. Release build:
Release build with LTO: