Done on Packet's m1.xlarge.x86 with this script .
Total build time: 4d 19h 50m 5s
LLVM build times (7 runs) All ./build-llvm.py invocations were run with --check-targets clang lld llvm --no-ccache --no-update.
Command
Mean [s]
Min [s]
Max [s]
Relative
./build-llvm.py --build-stage1-only624.713 ± 0.610
623.782
625.858
1.00
./build-llvm.py1006.284 ± 1.559
1003.950
1008.929
1.61 ± 0.00
./build-llvm.py --lto=thin3259.119 ± 4.720
3252.568
3264.702
5.22 ± 0.01
./build-llvm.py --lto=full6866.874 ± 69.054
6755.185
6965.644
10.99 ± 0.11
./build-llvm.py --pgo3097.596 ± 4.321
3094.325
3105.729
4.96 ± 0.01
./build-llvm.py --lto=thin --pgo5207.130 ± 5.725
5199.100
5212.698
8.34 ± 0.01
./build-llvm.py --lto=full --pgo6146.230 ± 45.917
6100.540
6243.587
9.84 ± 0.07
arm64 defconfig (48 runs)
Command
Mean [s]
Min [s]
Max [s]
Relative
GCC 9.2.0
162.250 ± 0.918
160.468
164.408
1.18 ± 0.01
LLVM (stage 1)
177.843 ± 0.482
176.858
178.845
1.29 ± 0.01
LLVM (default)
175.602 ± 0.515
174.678
176.909
1.28 ± 0.01
LLVM (ThinLTO)
170.241 ± 0.556
169.175
171.790
1.24 ± 0.01
LLVM (LTO)
169.940 ± 0.542
168.994
171.050
1.24 ± 0.01
LLVM (PGO)
145.391 ± 0.622
143.998
146.735
1.06 ± 0.01
LLVM (PGO + ThinLTO)
139.643 ± 0.555
138.554
140.766
1.02 ± 0.01
LLVM (PGO + LTO)
137.460 ± 0.457
136.281
138.376
1.00
arm32 multi_v7_defconfig (48 runs)
Command
Mean [s]
Min [s]
Max [s]
Relative
GCC 9.2.0
108.562 ± 0.638
107.309
110.105
1.04 ± 0.01
LLVM (stage 1)
135.741 ± 0.600
134.344
137.370
1.29 ± 0.01
LLVM (default)
133.958 ± 0.603
132.494
135.378
1.28 ± 0.01
LLVM (ThinLTO)
130.099 ± 0.513
129.269
131.100
1.24 ± 0.01
LLVM (LTO)
129.865 ± 0.427
128.894
130.557
1.24 ± 0.01
LLVM (PGO)
110.952 ± 0.422
110.026
111.900
1.06 ± 0.01
LLVM (PGO + ThinLTO)
106.781 ± 0.449
105.787
107.662
1.02 ± 0.01
LLVM (PGO + LTO)
104.863 ± 0.419
103.909
105.695
1.00
powerpc ppc44x_defconfig (48 runs)
Command
Mean [s]
Min [s]
Max [s]
Relative
GCC 9.2.0
35.519 ± 0.533
34.320
36.891
1.06 ± 0.02
LLVM (stage 1)
41.824 ± 0.400
41.176
42.943
1.25 ± 0.02
LLVM (default)
41.802 ± 0.362
41.104
42.553
1.25 ± 0.02
LLVM (ThinLTO)
40.519 ± 0.480
39.516
42.018
1.21 ± 0.02
LLVM (LTO)
40.271 ± 0.465
39.355
41.316
1.20 ± 0.02
LLVM (PGO)
35.506 ± 0.364
34.765
36.463
1.06 ± 0.02
LLVM (PGO + ThinLTO)
34.118 ± 0.389
33.383
34.980
1.02 ± 0.02
LLVM (PGO + LTO)
33.425 ± 0.330
32.663
34.367
1.00
powerpc powernv_defconfig (48 runs)
Command
Mean [s]
Min [s]
Max [s]
Relative
GCC 9.2.0
102.086 ± 0.726
100.287
103.348
1.00
LLVM (stage 1)
140.860 ± 0.775
138.934
142.287
1.38 ± 0.01
LLVM (default)
139.624 ± 0.784
137.967
141.420
1.37 ± 0.01
LLVM (ThinLTO)
135.690 ± 0.623
134.286
137.292
1.33 ± 0.01
LLVM (LTO)
134.912 ± 0.633
133.495
136.353
1.32 ± 0.01
LLVM (PGO)
114.171 ± 0.660
112.663
115.792
1.12 ± 0.01
LLVM (PGO + ThinLTO)
110.570 ± 0.571
109.420
111.832
1.08 ± 0.01
LLVM (PGO + LTO)
108.832 ± 0.575
107.860
110.243
1.07 ± 0.01
x86_64 defconfig (48 runs)
Command
Mean [s]
Min [s]
Max [s]
Relative
GCC 9.2.0
70.294 ± 0.647
68.986
71.747
1.00
LLVM (stage 1)
90.881 ± 0.450
89.935
91.796
1.29 ± 0.01
LLVM (default)
89.734 ± 0.557
87.932
90.944
1.28 ± 0.01
LLVM (ThinLTO)
87.397 ± 0.657
85.697
89.129
1.24 ± 0.01
LLVM (LTO)
86.978 ± 0.601
85.225
88.790
1.24 ± 0.01
LLVM (PGO)
75.349 ± 0.453
74.414
76.164
1.07 ± 0.01
LLVM (PGO + ThinLTO)
72.868 ± 0.482
71.715
74.042
1.04 ± 0.01
LLVM (PGO + LTO)
71.644 ± 0.496
70.781
72.932
1.02 ± 0.01
