LTO performance

configuration no lto

CC=clang-10 CXX=clang++-10 LDFLAGS=-fuse-ld=lld-10 ./configure --with-incompatible-bdb


Build Options:
  with endomorphism   = no
  with ecmult precomp = yes
  with jni            = no
  with benchmarks     = no
  with coverage       = no
  module ecdh         = no
  module recovery     = yes

  asm                 = x86_64
  bignum              = no
  field               = 64bit
  scalar              = 64bit

  CC                  = clang-10
  CFLAGS              = -g -O2 -W -std=c89 -pedantic -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes -Wno-unused-function -Wno-long-long -Wno-overlength-strings -fvisibility=hidden -O3
  CPPFLAGS            = 
  LDFLAGS             = -fuse-ld=lld-10


Options used to compile and link:
  with wallet   = yes
  with gui / qt = no
  with zmq      = no
  with test     = yes
    with prop   = no
    with fuzz   = no
  with bench    = yes
  with upnp     = no
  use asm       = yes
  sanitizers    = 
  debug enabled = no
  gprof enabled = no
  werror        = no

  target os     = linux
  build os      = 

  CC            = clang-10
  CFLAGS        = -g -O2
  CPPFLAGS      =   -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2  -DHAVE_BUILD_INFO -D__STDC_FORMAT_MACROS
  CXX           = clang++-10 -std=c++11
  CXXFLAGS      =   -Wstack-protector -fstack-protector-all  -Wall -Wextra -Wformat -Wvla -Wswitch -Wformat-security -Wthread-safety-analysis -Wrange-loop-analysis -Wredundant-decls -Wunused-variable -Wdate-time  -Wno-unused-parameter -Wno-self-assign -Wno-unused-local-typedef -Wno-deprecated-register -Wno-implicit-fallthrough   -g -O2
  LDFLAGS       = -pthread  -Wl,-z,relro -Wl,-z,now -pie  -fuse-ld=lld-10
  ARFLAGS       = cr

real    2m27.493s
user    27m0.853s
sys     0m42.137s


profiler@profiler-OptiPlex-7060:~/bitcoin$ readelf --string-dump=.comment src/bitcoind

String dump of section '.comment':
  [     0]  Linker: LLD 10.0.0
  [    13]  GCC: (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0
  [    3e]  clang version 10.0.0-++20200128013420+c23212a438f-1~exp1~20200128004016.25 

configuration with lto

CC=clang-10 CXX=clang++-10 LDFLAGS='-fuse-ld=lld-10 -flto' RANLIB=llvm-ranlib-10 AR=llvm-ar-10 ./configure --with-incompatible-bdb
Build Options:
  with endomorphism   = no
  with ecmult precomp = yes
  with jni            = no
  with benchmarks     = no
  with coverage       = no
  module ecdh         = no
  module recovery     = yes

  asm                 = x86_64
  bignum              = no
  field               = 64bit
  scalar              = 64bit

  CC                  = clang-10
  CFLAGS              = -g -O2 -W -std=c89 -pedantic -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes -Wno-unused-function -Wno-long-long -Wno-overlength-strings -fvisibility=hidden -O3 -flto
  CPPFLAGS            = 
  LDFLAGS             = -fuse-ld=lld-10 -flto


Options used to compile and link:
  with wallet   = yes
  with gui / qt = no
  with zmq      = no
  with test     = yes
    with prop   = no
    with fuzz   = no
  with bench    = yes
  with upnp     = no
  use asm       = yes
  sanitizers    = 
  debug enabled = no
  gprof enabled = no
  werror        = no

  target os     = linux
  build os      = 

  CC            = clang-10
  CFLAGS        = -flto -g -O2
  CPPFLAGS      =   -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2  -DHAVE_BUILD_INFO -D__STDC_FORMAT_MACROS
  CXX           = clang++-10 -std=c++11
  CXXFLAGS      =   -Wstack-protector -fstack-protector-all  -Wall -Wextra -Wformat -Wvla -Wswitch -Wformat-security -Wthread-safety-analysis -Wrange-loop-analysis -Wredundant-decls -Wunused-variable -Wdate-time  -Wno-unused-parameter -Wno-self-assign -Wno-unused-local-typedef -Wno-deprecated-register -Wno-implicit-fallthrough   -flto -g -O2
  LDFLAGS       = -pthread  -Wl,-z,relro -Wl,-z,now -pie  -fuse-ld=lld-10 -flto
  ARFLAGS       = cr

lto.patch

diff --git a/configure.ac b/configure.ac
index 18f3104ac..49d89682e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -272,6 +272,8 @@ AC_ARG_ENABLE([werror],
 AC_LANG_PUSH([C++])
 AX_CHECK_COMPILE_FLAG([-Werror],[CXXFLAG_WERROR="-Werror"],[CXXFLAG_WERROR=""])
 
+CFLAGS="-flto $CFLAGS"
+CXXFLAGS="-flto $CXXFLAGS"
 if test "x$enable_debug" = xyes; then
   dnl Clear default -g -O2 flags
   if test "x$CXXFLAGS_overridden" = xno; then
diff --git a/src/secp256k1/configure.ac b/src/secp256k1/configure.ac
index 3b7a328c8..91ea78e49 100644
--- a/src/secp256k1/configure.ac
+++ b/src/secp256k1/configure.ac
@@ -156,9 +156,9 @@ AC_CHECK_TYPES([__int128])
 if test x"$enable_coverage" = x"yes"; then
     AC_DEFINE(COVERAGE, 1, [Define this symbol to compile out all VERIFY code])
     CFLAGS="$CFLAGS -O0 --coverage"
-    LDFLAGS="--coverage"
+    LDFLAGS="--coverage -flto"
 else
-    CFLAGS="$CFLAGS -O3"
+    CFLAGS="$CFLAGS -O3 -flto"
 fi
 
 if test x"$use_ecmult_static_precomputation" != x"no"; then

pc spec

CPU: 
Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz


$ free
              total        used        free      shared  buff/cache   available
Mem:       32727916     4167888     2124968      511068    26435060    27579244
Swap:       2097148        2048     2095100


$ uname -a
Linux profiler-OptiPlex-7060 5.0.0-37-generic #40~18.04.1-Ubuntu SMP Thu Nov 14 12:06:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux


OS: 
Ubuntu bionic 18.04.3 LTS


$ fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=random_read_write.fio --bs=4k --iodepth=64 --size=180M --time_based=1 --runtime=20 --readwrite=randrw --rwmixread=75
test: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=64
fio-3.1
Starting 1 process
test: Laying out IO file (1 file / 180MiB)
Jobs: 1 (f=1): [m(1)][100.0%][r=892MiB/s,w=298MiB/s][r=228k,w=76.3k IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=8246: Thu Dec 19 18:14:43 2019
   read: IOPS=237k, BW=928MiB/s (973MB/s)(18.1GiB/20001msec)
   bw (  KiB/s): min=859112, max=981688, per=99.98%, avg=949786.75, stdev=26240.62, samples=40
   iops        : min=214780, max=245422, avg=237446.70, stdev=6560.01, samples=40
  write: IOPS=79.2k, BW=309MiB/s (325MB/s)(6190MiB/20001msec)
   bw (  KiB/s): min=287704, max=329208, per=99.98%, avg=316864.70, stdev=8833.78, samples=40
   iops        : min=71926, max=82302, avg=79216.10, stdev=2208.45, samples=40
  cpu          : usr=38.65%, sys=59.31%, ctx=19279, majf=0, minf=6
  IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=0.1%, >=64=100.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.1%, >=64=0.0%
     issued rwt: total=4749941,1584649,0, short=0,0,0, dropped=0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=64

Run status group 0 (all jobs):
   READ: bw=928MiB/s (973MB/s), 928MiB/s-928MiB/s (973MB/s-973MB/s), io=18.1GiB (19.5GB), run=20001-20001msec
  WRITE: bw=309MiB/s (325MB/s), 309MiB/s-309MiB/s (325MB/s-325MB/s), io=6190MiB (6491MB), run=20001-20001msec

Disk stats (read/write):
  nvme0n1: ios=4721801/1575261, merge=0/9, ticks=609737/23999, in_queue=0, util=99.56%


cpu flags:
     12 flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d


lshw:
profiler-optiplex-7060
    description: Desktop Computer
    product: OptiPlex 7060 (085A)
    vendor: Dell Inc.
    serial: GWCPYQ2
    width: 64 bits
    capabilities: smbios-3.1 dmi-3.1 smp vsyscall32
    configuration: boot=normal chassis=desktop family=OptiPlex sku=085A uuid=44454C4C-5700-1043-8050-C7C04F595132
  *-core
       description: Motherboard
       product: 0C96W1
       vendor: Dell Inc.
       physical id: 0
       version: A02
       serial: /GWCPYQ2/CNWS20087301BK/
     *-firmware
          description: BIOS
          vendor: Dell Inc.
          physical id: 0
          version: 1.3.4
          date: 03/18/2019
          size: 64KiB
          capacity: 15MiB
          capabilities: pci pnp upgrade shadowing cdboot bootselect edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification netboot uefi
     *-memory
          description: System Memory
          physical id: 9
          slot: System board or motherboard
          size: 32GiB
        *-bank:0
             description: DIMM DDR4 Synchronous 2400 MHz (0.4 ns)
             product: CT16G4DFD824A.M16FD
             vendor: 859B0000802C
             physical id: 0
             serial: E0B9E723
             slot: DIMM1
             size: 16GiB
             width: 64 bits
             clock: 2400MHz (0.4ns)
        *-bank:1
             description: DIMM DDR4 Synchronous 2400 MHz (0.4 ns)
             product: CT16G4DFD824A.M16FD
             vendor: 859B0000802C
             physical id: 1
             serial: E0B9E46A
             slot: DIMM2
             size: 16GiB
             width: 64 bits
             clock: 2400MHz (0.4ns)
        *-bank:2
             description: [empty]
             physical id: 2
             slot: DIMM3
        *-bank:3
             description: [empty]
             physical id: 3
             slot: DIMM4
     *-cache:0
          description: L1 cache
          physical id: 14
          slot: L1 Cache
          size: 384KiB
          capacity: 384KiB
          capabilities: synchronous internal write-back unified
          configuration: level=1
     *-cache:1
          description: L2 cache
          physical id: 15
          slot: L2 Cache
          size: 1536KiB
          capacity: 1536KiB
          capabilities: synchronous internal write-back unified
          configuration: level=2
     *-cache:2
          description: L3 cache
          physical id: 16
          slot: L3 Cache
          size: 12MiB
          capacity: 12MiB
          capabilities: synchronous internal write-back unified
          configuration: level=3
     *-cpu
          description: CPU
          product: Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
          vendor: Intel Corp.
          physical id: 17
          bus info: cpu@0
          version: Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
          slot: U3E1
          size: 1866MHz
          capacity: 4600MHz
          width: 64 bits
          clock: 100MHz
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d cpufreq
          configuration: cores=6 enabledcores=6 threads=12
     *-pci
          description: Host bridge
          product: 8th Gen Core Processor Host Bridge/DRAM Registers
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 07
          width: 32 bits
          clock: 33MHz
          configuration: driver=skl_uncore
          resources: irq:0
        *-display
             description: VGA compatible controller
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
             configuration: driver=i915 latency=0
             resources: irq:141 memory:90000000-90ffffff memory:80000000-8fffffff ioport:3000(size=64) memory:c0000-dffff
        *-generic:0 UNCLAIMED
             description: System peripheral
             product: Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model
             vendor: Intel Corporation
             physical id: 8
             bus info: pci@0000:00:08.0
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm cap_list
             configuration: latency=0
             resources: memory:9123f000-9123ffff
        *-generic:1
             description: Signal processing controller
             product: Cannon Lake PCH Thermal Controller
             vendor: Intel Corporation
             physical id: 12
             bus info: pci@0000:00:12.0
             version: 10
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi cap_list
             configuration: driver=intel_pch_thermal latency=0
             resources: irq:17 memory:9123e000-9123efff
        *-usb
             description: USB controller
             product: Cannon Lake PCH USB 3.1 xHCI Host Controller
             vendor: Intel Corporation
             physical id: 14
             bus info: pci@0000:00:14.0
             version: 10
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi xhci bus_master cap_list
             configuration: driver=xhci_hcd latency=0
             resources: irq:124 memory:91220000-9122ffff
           *-usbhost:0
                product: xHCI Host Controller
                vendor: Linux 5.0.0-37-generic xhci-hcd
                physical id: 0
                bus info: usb@1
                logical name: usb1
                version: 5.00
                capabilities: usb-2.00
                configuration: driver=hub slots=16 speed=480Mbit/s
              *-usb:0
                   description: Keyboard
                   product: Wired Keyboard 600
                   vendor: Microsoft
                   physical id: 1
                   bus info: usb@1:1
                   version: 3.00
                   capabilities: usb-2.00
                   configuration: driver=usbhid maxpower=100mA speed=2Mbit/s
              *-usb:1
                   description: Mouse
                   product: Dell MS116 USB Optical Mouse
                   vendor: PixArt
                   physical id: 9
                   bus info: usb@1:9
                   version: 1.00
                   capabilities: usb-2.00
                   configuration: driver=usbhid maxpower=100mA speed=2Mbit/s
              *-usb:2
                   description: Mass storage device
                   product: Flash Drive FIT
                   vendor: Samsung
                   physical id: a
                   bus info: usb@1:a
                   version: 11.00
                   serial: 0305119060010725
                   capabilities: usb-2.10 scsi
                   configuration: driver=usb-storage maxpower=300mA speed=480Mbit/s
           *-usbhost:1
                product: xHCI Host Controller
                vendor: Linux 5.0.0-37-generic xhci-hcd
                physical id: 1
                bus info: usb@2
                logical name: usb2
                version: 5.00
                capabilities: usb-3.10
                configuration: driver=hub slots=10 speed=10000Mbit/s
        *-memory UNCLAIMED
             description: RAM memory
             product: Cannon Lake PCH Shared SRAM
             vendor: Intel Corporation
             physical id: 14.2
             bus info: pci@0000:00:14.2
             version: 10
             width: 64 bits
             clock: 33MHz (30.3ns)
             capabilities: pm cap_list
             configuration: latency=0
             resources: memory:91236000-91237fff memory:9123d000-9123dfff
        *-serial:0
             description: Serial bus controller
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 15
             bus info: pci@0000:00:15.0
             version: 10
             width: 64 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=intel-lpss latency=0
             resources: irq:16 memory:7f800000-7f800fff
        *-communication
             description: Communication controller
             product: Cannon Lake PCH HECI Controller
             vendor: Intel Corporation
             physical id: 16
             bus info: pci@0000:00:16.0
             version: 10
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=mei_me latency=0
             resources: irq:140 memory:9123b000-9123bfff
        *-storage
             description: SATA controller
             product: Cannon Lake PCH SATA AHCI Controller
             vendor: Intel Corporation
             physical id: 17
             bus info: pci@0000:00:17.0
             version: 10
             width: 32 bits
             clock: 66MHz
             capabilities: storage msi pm ahci_1.0 bus_master cap_list
             configuration: driver=ahci latency=0
             resources: irq:125 memory:91234000-91235fff memory:9123a000-9123a0ff ioport:3090(size=8) ioport:3080(size=4) ioport:3060(size=32) memory:91239000-912397ff
        *-pci:0
             description: PCI bridge
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: f0
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:122 memory:91100000-911fffff
           *-storage
                description: Non-Volatile memory controller
                product: NVMe SSD Controller SM981/PM981
                vendor: Samsung Electronics Co Ltd
                physical id: 0
                bus info: pci@0000:01:00.0
                version: 00
                width: 64 bits
                clock: 33MHz
                capabilities: storage pm msi pciexpress msix nvm_express bus_master cap_list
                configuration: driver=nvme latency=0
                resources: irq:16 memory:91100000-91103fff
        *-pci:1
             description: PCI bridge
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 1c
             bus info: pci@0000:00:1c.0
             version: f0
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:123
           *-pci
                description: PCI bridge
                product: XIO2001 PCI Express-to-PCI Bridge
                vendor: Texas Instruments
                physical id: 0
                bus info: pci@0000:02:00.0
                version: 00
                width: 32 bits
                clock: 33MHz
                capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
        *-isa
             description: ISA bridge
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 1f
             bus info: pci@0000:00:1f.0
             version: 10
             width: 32 bits
             clock: 33MHz
             capabilities: isa bus_master
             configuration: latency=0
        *-multimedia
             description: Audio device
             product: Cannon Lake PCH cAVS
             vendor: Intel Corporation
             physical id: 1f.3
             bus info: pci@0000:00:1f.3
             version: 10
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=snd_hda_intel latency=32
             resources: irq:142 memory:91230000-91233fff memory:91000000-910fffff
        *-serial:1 UNCLAIMED
             description: SMBus
             product: Cannon Lake PCH SMBus Controller
             vendor: Intel Corporation
             physical id: 1f.4
             bus info: pci@0000:00:1f.4
             version: 10
             width: 64 bits
             clock: 33MHz
             configuration: latency=0
             resources: memory:91238000-912380ff ioport:efa0(size=32)
        *-serial:2 UNCLAIMED
             description: Serial bus controller
             product: Cannon Lake PCH SPI Controller
             vendor: Intel Corporation
             physical id: 1f.5
             bus info: pci@0000:00:1f.5
             version: 10
             width: 32 bits
             clock: 33MHz
             configuration: latency=0
             resources: memory:fe010000-fe010fff
        *-network
             description: Ethernet interface
             product: Ethernet Connection (7) I219-LM
             vendor: Intel Corporation
             physical id: 1f.6
             bus info: pci@0000:00:1f.6
             logical name: eno1
             version: 10
             serial: 8c:ec:4b:89:7f:cd
             capacity: 1Gbit/s
             width: 32 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
             configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k firmware=0.5-4 latency=0 link=no multicast=yes port=twisted pair
             resources: irq:127 memory:91200000-9121ffff
     *-scsi:0
          physical id: 1
          logical name: scsi2
          capabilities: emulated
        *-cdrom
             description: DVD-RAM writer
             product: DVD+-RW GU90N
             vendor: HL-DT-ST
             physical id: 0.0.0
             bus info: scsi@2:0.0.0
             logical name: /dev/cdrom
             logical name: /dev/cdrw
             logical name: /dev/dvd
             logical name: /dev/dvdrw
             logical name: /dev/sr0
             version: A1C3
             capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
             configuration: ansiversion=5 status=nodisc
     *-scsi:1
          physical id: 2
          bus info: usb@1:10
          logical name: scsi4
          capabilities: emulated scsi-host
          configuration: driver=usb-storage
        *-disk
             description: SCSI Disk
             product: Flash Drive FIT
             vendor: Samsung
             physical id: 0.0.0
             bus info: scsi@4:0.0.0
             logical name: /dev/sda
             version: 1100
             serial: AA00000000000489
             size: 119GiB (128GB)
             capabilities: removable
             configuration: ansiversion=6 logicalsectorsize=512 sectorsize=512
           *-medium
                physical id: 0
                logical name: /dev/sda
                size: 119GiB (128GB)
                capabilities: gpt-1.00 partitioned partitioned:gpt
                configuration: guid=8e160965-330e-4882-abc5-fbe49b776ed5
              *-volume
                   description: EFI partition
                   physical id: 1
                   logical name: /dev/sda1
                   logical name: /media/profiler/142E-C685
                   serial: 957faa5c-f6f1-4b49-8065-328066db8a7f
                   capacity: 119GiB
                   configuration: mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 state=mounted

result

without lto:

profiler@profiler-OptiPlex-7060:~/.bitcoin-prune$ time ./command

real    226m24.587s
user    315m59.349s
sys     44m54.132s

with lto:
profiler@profiler-OptiPlex-7060:~/.bitcoin-prune$ time ./command

real    220m29.324s
user    301m52.406s
sys     45m23.807s



pruned command: /home/profiler/bitcoin/src/bitcoind -datadir="/home/profiler/.bitcoin-prune" -rpcport=9999 -dbcache=12288 -stopatheight=600000 -debug=0 -nodebuglogfile -printtoconsole=0 -dnsseed=0 -prune=550 -connect=127.0.0.1:3333

synced node command: /home/profiler/bitcoin/src/bitcoind -datadir="/home/profiler/.bitcoin" -dbcache=12288 -debug=0 -nodebuglogfile -printtoconsole=0 --port=3333 -dnsseed=0 --listen=127.0.0.1 --maxtipage=$((24*60*60*365))

-match=native no lto:
real 230m37.674s
user 307m5.831s
sys 45m46.473s