Add build if changed script

[dapplion]

Motivation

In some setups I'm building in VPS the build command is run many times when no changes have been done.

The current yarn build command blindly nukes the build artifacts and does a build from scratch, which take ~2-3 min

Description

• Persist the last time a specific package src was modified
• Check if there has been modifications between that time and now

If there has been no modification running the script over all packages takes 0.5 sec. find is very fast.

yarn build:ifchanged

Caveats

• May only work on some UNIX, Linux systems

[codeclimate]

Code Climate has analyzed commit d769f30 and detected 0 issues on this pull request.

View more on Code Climate.

[codecov]

Codecov Report

Merging #3543 (d769f30) into master (89dd289) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3543   +/-   ##
=======================================
  Coverage   37.56%   37.56%           
=======================================
  Files         310      310           
  Lines        8253     8253           
  Branches     1273     1273           
=======================================
  Hits         3100     3100           
  Misses       5005     5005           
  Partials      148      148           

[github-actions]

Performance Report

✔️ no performance regression detected

Full benchmark results

Benchmark suite	Current: 02af1a2	Previous: 89dd289	Ratio
BeaconState.hashTreeRoot - No change	640.00 ns/op	660.00 ns/op	0.97
BeaconState.hashTreeRoot - 1 full validator	174.91 us/op	164.98 us/op	1.06
BeaconState.hashTreeRoot - 32 full validator	2.6380 ms/op	2.2908 ms/op	1.15
BeaconState.hashTreeRoot - 512 full validator	33.396 ms/op	30.112 ms/op	1.11
BeaconState.hashTreeRoot - 1 validator.effectiveBalance	170.27 us/op	144.43 us/op	1.18
BeaconState.hashTreeRoot - 32 validator.effectiveBalance	2.6644 ms/op	2.4145 ms/op	1.10
BeaconState.hashTreeRoot - 512 validator.effectiveBalance	37.193 ms/op	32.953 ms/op	1.13
BeaconState.hashTreeRoot - 1 balances	125.03 us/op	105.34 us/op	1.19
BeaconState.hashTreeRoot - 32 balances	1.0130 ms/op	914.46 us/op	1.11
BeaconState.hashTreeRoot - 512 balances	9.3422 ms/op	8.6955 ms/op	1.07
BeaconState.hashTreeRoot - 250000 balances	177.29 ms/op	155.99 ms/op	1.14
processSlot - 1 slots	72.289 us/op	55.421 us/op	1.30
processSlot - 32 slots	4.2042 ms/op	3.3490 ms/op	1.26
getCommitteeAssignments - req 1 vs - 250000 vc	5.6806 ms/op	6.1925 ms/op	0.92
getCommitteeAssignments - req 100 vs - 250000 vc	8.3626 ms/op	8.7442 ms/op	0.96
getCommitteeAssignments - req 1000 vs - 250000 vc	8.7501 ms/op	9.0352 ms/op	0.97
computeProposers - vc 250000	27.781 ms/op	24.437 ms/op	1.14
computeEpochShuffling - vc 250000	213.42 ms/op	220.61 ms/op	0.97
getNextSyncCommittee - vc 250000	436.83 ms/op	404.58 ms/op	1.08
altair processAttestation - 250000 vs - 7PWei normalcase	56.963 ms/op	48.699 ms/op	1.17
altair processAttestation - 250000 vs - 7PWei worstcase	75.836 ms/op	51.021 ms/op	1.49
altair processAttestation - setStatus - 1/6 committees join	16.643 ms/op	12.375 ms/op	1.34
altair processAttestation - setStatus - 1/3 committees join	32.656 ms/op	26.207 ms/op	1.25
altair processAttestation - setStatus - 1/2 committees join	47.310 ms/op	40.710 ms/op	1.16
altair processAttestation - setStatus - 2/3 committees join	61.747 ms/op	52.809 ms/op	1.17
altair processAttestation - setStatus - 4/5 committees join	76.247 ms/op	63.144 ms/op	1.21
altair processAttestation - setStatus - 100% committees join	99.859 ms/op	79.594 ms/op	1.25
altair processAttestation - updateEpochParticipants - 1/6 committees join	17.086 ms/op	13.387 ms/op	1.28
altair processAttestation - updateEpochParticipants - 1/3 committees join	35.219 ms/op	27.956 ms/op	1.26
altair processAttestation - updateEpochParticipants - 1/2 committees join	33.995 ms/op	51.244 ms/op	0.66
altair processAttestation - updateEpochParticipants - 2/3 committees join	34.976 ms/op	28.436 ms/op	1.23
altair processAttestation - updateEpochParticipants - 4/5 committees join	44.085 ms/op	30.582 ms/op	1.44
altair processAttestation - updateEpochParticipants - 100% committees join	38.352 ms/op	33.071 ms/op	1.16
altair processAttestation - updateAllStatus	27.829 ms/op	24.207 ms/op	1.15
altair processBlock - 250000 vs - 7PWei normalcase	59.317 ms/op	50.092 ms/op	1.18
altair processBlock - 250000 vs - 7PWei worstcase	156.84 ms/op	133.80 ms/op	1.17
altair processEpoch - mainnet_e81889	1.2758 s/op	1.2333 s/op	1.03
mainnet_e81889 - altair beforeProcessEpoch	317.43 ms/op	307.71 ms/op	1.03
mainnet_e81889 - altair processJustificationAndFinalization	124.14 us/op	81.609 us/op	1.52
mainnet_e81889 - altair processInactivityUpdates	22.347 ms/op	21.292 ms/op	1.05
mainnet_e81889 - altair processRewardsAndPenalties	264.14 ms/op	267.20 ms/op	0.99
mainnet_e81889 - altair processRegistryUpdates	20.812 us/op	10.406 us/op	2.00
mainnet_e81889 - altair processSlashings	6.2120 us/op	3.6400 us/op	1.71
mainnet_e81889 - altair processEth1DataReset	6.3500 us/op	2.8000 us/op	2.27
mainnet_e81889 - altair processEffectiveBalanceUpdates	14.958 ms/op	13.863 ms/op	1.08
mainnet_e81889 - altair processSlashingsReset	36.784 us/op	16.717 us/op	2.20
mainnet_e81889 - altair processRandaoMixesReset	46.007 us/op	20.823 us/op	2.21
mainnet_e81889 - altair processHistoricalRootsUpdate	9.2940 us/op	4.0500 us/op	2.29
mainnet_e81889 - altair processParticipationFlagUpdates	118.77 ms/op	118.95 ms/op	1.00
mainnet_e81889 - altair processSyncCommitteeUpdates	5.3630 us/op	3.1240 us/op	1.72
mainnet_e81889 - altair afterProcessEpoch	248.68 ms/op	258.55 ms/op	0.96
altair processInactivityUpdates - 250000 normalcase	92.353 ms/op	86.307 ms/op	1.07
altair processInactivityUpdates - 250000 worstcase	91.463 ms/op	86.239 ms/op	1.06
altair processParticipationFlagUpdates - 250000 anycase	113.96 ms/op	105.81 ms/op	1.08
altair processRewardsAndPenalties - 250000 normalcase	138.13 ms/op	144.56 ms/op	0.96
altair processRewardsAndPenalties - 250000 worstcase	139.04 ms/op	145.76 ms/op	0.95
altair processSyncCommitteeUpdates - 250000	461.06 ms/op	416.45 ms/op	1.11
Tree 40 250000 create	900.27 ms/op	788.53 ms/op	1.14
Tree 40 250000 get(125000)	363.17 ns/op	394.71 ns/op	0.92
Tree 40 250000 set(125000)	3.0844 us/op	2.5355 us/op	1.22
Tree 40 250000 toArray()	50.612 ms/op	51.836 ms/op	0.98
Tree 40 250000 iterate all - toArray() + loop	50.432 ms/op	44.050 ms/op	1.14
Tree 40 250000 iterate all - get(i)	139.21 ms/op	136.99 ms/op	1.02
MutableVector 250000 create	29.565 ms/op	29.061 ms/op	1.02
MutableVector 250000 get(125000)	16.100 ns/op	16.796 ns/op	0.96
MutableVector 250000 set(125000)	741.61 ns/op	595.97 ns/op	1.24
MutableVector 250000 toArray()	10.276 ms/op	10.363 ms/op	0.99
MutableVector 250000 iterate all - toArray() + loop	10.029 ms/op	10.486 ms/op	0.96
MutableVector 250000 iterate all - get(i)	3.8198 ms/op	3.7440 ms/op	1.02
Array 250000 create	6.2133 ms/op	6.7760 ms/op	0.92
Array 250000 clone - spread	2.5472 ms/op	2.6633 ms/op	0.96
Array 250000 get(125000)	1.2080 ns/op	1.2110 ns/op	1.00
Array 250000 set(125000)	1.1730 ns/op	1.2440 ns/op	0.94
Array 250000 iterate all - loop	154.01 us/op	196.39 us/op	0.78
aggregationBits - 2048 els - readonlyValues	255.28 us/op	276.07 us/op	0.92
aggregationBits - 2048 els - zipIndexesInBitList	46.365 us/op	48.795 us/op	0.95
regular array get 100000 times	60.237 us/op	79.990 us/op	0.75
wrappedArray get 100000 times	61.490 us/op	79.363 us/op	0.77
arrayWithProxy get 100000 times	37.170 ms/op	37.436 ms/op	0.99
ssz.Root.equals	1.3680 us/op	1.3760 us/op	0.99
ssz.Root.equals with valueOf()	1.7990 us/op	1.5890 us/op	1.13
byteArrayEquals with valueOf()	1.6530 us/op	1.5310 us/op	1.08
phase0 processBlock - 250000 vs - 7PWei normalcase	14.135 ms/op	12.273 ms/op	1.15
phase0 processBlock - 250000 vs - 7PWei worstcase	102.20 ms/op	89.822 ms/op	1.14
phase0 afterProcessEpoch - 250000 vs - 7PWei	231.76 ms/op	243.59 ms/op	0.95
phase0 beforeProcessEpoch - 250000 vs - 7PWei	768.38 ms/op	666.66 ms/op	1.15
phase0 processEpoch - mainnet_e58758	981.36 ms/op	912.09 ms/op	1.08
mainnet_e58758 - phase0 beforeProcessEpoch	623.20 ms/op	562.46 ms/op	1.11
mainnet_e58758 - phase0 processJustificationAndFinalization	117.88 us/op	70.339 us/op	1.68
mainnet_e58758 - phase0 processRewardsAndPenalties	192.17 ms/op	114.53 ms/op	1.68
mainnet_e58758 - phase0 processRegistryUpdates	83.053 us/op	51.545 us/op	1.61
mainnet_e58758 - phase0 processSlashings	6.6240 us/op	3.7490 us/op	1.77
mainnet_e58758 - phase0 processEth1DataReset	5.3070 us/op	2.6650 us/op	1.99
mainnet_e58758 - phase0 processEffectiveBalanceUpdates	11.998 ms/op	10.691 ms/op	1.12
mainnet_e58758 - phase0 processSlashingsReset	30.734 us/op	14.099 us/op	2.18
mainnet_e58758 - phase0 processRandaoMixesReset	39.495 us/op	21.300 us/op	1.85
mainnet_e58758 - phase0 processHistoricalRootsUpdate	7.2600 us/op	3.8330 us/op	1.89
mainnet_e58758 - phase0 processParticipationRecordUpdates	28.856 us/op	14.574 us/op	1.98
mainnet_e58758 - phase0 afterProcessEpoch	211.86 ms/op	248.66 ms/op	0.85
phase0 processEffectiveBalanceUpdates - 250000 normalcase	13.546 ms/op	12.301 ms/op	1.10
phase0 processEffectiveBalanceUpdates - 250000 worstcase 0.5	1.8481 s/op	1.4594 s/op	1.27
phase0 processRegistryUpdates - 250000 normalcase	91.517 us/op	49.018 us/op	1.87
phase0 processRegistryUpdates - 250000 badcase_full_deposits	3.8908 ms/op	3.3602 ms/op	1.16
phase0 processRegistryUpdates - 250000 worstcase 0.5	2.6171 s/op	2.0014 s/op	1.31
phase0 getAttestationDeltas - 250000 normalcase	39.142 ms/op	42.383 ms/op	0.92
phase0 getAttestationDeltas - 250000 worstcase	39.481 ms/op	41.965 ms/op	0.94
phase0 processSlashings - 250000 worstcase	46.578 ms/op	45.232 ms/op	1.03
shuffle list - 16384 els	14.753 ms/op	14.731 ms/op	1.00
shuffle list - 250000 els	202.09 ms/op	213.21 ms/op	0.95
getEffectiveBalances - 250000 vs - 7PWei	12.585 ms/op	14.111 ms/op	0.89
computeDeltas	4.4339 ms/op	4.2646 ms/op	1.04
getPubkeys - index2pubkey - req 1000 vs - 250000 vc	2.7560 ms/op	2.4548 ms/op	1.12
getPubkeys - validatorsArr - req 1000 vs - 250000 vc	834.45 us/op	750.17 us/op	1.11
BLS verify - blst-native	2.4032 ms/op	2.1685 ms/op	1.11
BLS verifyMultipleSignatures 3 - blst-native	4.7751 ms/op	4.4958 ms/op	1.06
BLS verifyMultipleSignatures 8 - blst-native	10.381 ms/op	9.6921 ms/op	1.07
BLS verifyMultipleSignatures 32 - blst-native	37.453 ms/op	34.880 ms/op	1.07
BLS aggregatePubkeys 32 - blst-native	50.145 us/op	46.885 us/op	1.07
BLS aggregatePubkeys 128 - blst-native	200.29 us/op	183.81 us/op	1.09
getAttestationsForBlock	96.706 ms/op	87.039 ms/op	1.11
CheckpointStateCache - add get delete	19.049 us/op	18.281 us/op	1.04
validate gossip signedAggregateAndProof - struct	5.7136 ms/op	5.2288 ms/op	1.09
validate gossip signedAggregateAndProof - treeBacked	5.6098 ms/op	5.1914 ms/op	1.08
validate gossip attestation - struct	2.6587 ms/op	2.4606 ms/op	1.08
validate gossip attestation - treeBacked	2.6729 ms/op	2.4892 ms/op	1.07
Object access 1 prop	0.43100 ns/op	0.39400 ns/op	1.09
Map access 1 prop	0.34100 ns/op	0.33000 ns/op	1.03
Object get x1000	17.025 ns/op	20.759 ns/op	0.82
Map get x1000	1.1070 ns/op	1.1280 ns/op	0.98
Object set x1000	119.06 ns/op	128.86 ns/op	0.92
Map set x1000	84.296 ns/op	80.234 ns/op	1.05
Return object 10000 times	0.45480 ns/op	0.43070 ns/op	1.06
Throw Error 10000 times	7.3290 us/op	6.8269 us/op	1.07
RateTracker 1000000 limit, 1 obj count per request	208.85 ns/op	213.56 ns/op	0.98
RateTracker 1000000 limit, 2 obj count per request	154.29 ns/op	162.20 ns/op	0.95
RateTracker 1000000 limit, 4 obj count per request	134.19 ns/op	133.22 ns/op	1.01
RateTracker 1000000 limit, 8 obj count per request	124.32 ns/op	120.36 ns/op	1.03
RateTracker with prune	5.0120 us/op	4.7760 us/op	1.05

by benchmarkbot/action