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Measuring Performance
Using Logging
by.
2018/6/19 Roppongi.swift
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takasek
@takasek
Works
OSS: ActionClosurable
App: PasteTheType
Articles
ʮίϯύΠϧΤϥʔϥϯλΠϜΤϥʔΛ͍ͯ͘͠
͚ͩͰiOSΞϓϦͷ࡞Γํ͕Θ͔ΔϓϩδΣΫτʯ
ʮ͓લΒ͕ModelͱݺͿΞϨΛͳΜͱݺͿ͖͔ʯ
!
ʮiOSΞϓϦઃܭύλʔϯೖʯʢڞஶʣ
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os_log
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os_log
WWDC2016͔Βಋೖ͞Εͨ
let logHandle = OSLog(
subsystem: "com.example.widget",
category: "Setup"
)
os_log(.info, log: logHandle,
"Hello, %{public}s!",
world
)
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signpost
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signpost
• os_log family
• InstrumentsͰύϑΥʔϚϯεܭଌʹ͑ΔΑ͏ʹ֦ு
• ͍ܰ
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ϧʔϓॲཧͷ࣌ؒΛ
ܭଌ͍ͨ͠
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for element in panel.elements {
fetchAsset(for: element)
}
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import os.signpost
for element in panel.elements {
fetchAsset(for: element)
}
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import os.signpost
let refreshLog = OSLog( //
!
subsystem: "com.example.your-app",
category: "RefreshOperations"
)
for element in panel.elements {
fetchAsset(for: element)
}
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import os.signpost
let refreshLog = OSLog(
subsystem: "com.example.your-app",
category: "RefreshOperations"
)
for element in panel.elements {
os_signpost(type: .begin, log: refreshLog, //
name: "
"
")
fetchAsset(for: element)
os_signpost(type: .end, log: refreshLog, //
name: "
"
")
}
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ॲཧશମͷ࣌ؒΛ
ܭଌ͍ͨ͠
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for element in panel.elements {
os_signpost(type: .begin, log: refreshLog, name: " ")
fetchAsset(for: element)
os_signpost(type: .end, log: refreshLog, name: " ")
}
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os_signpost(type: .begin, log: refreshLog, name: " ") //
for element in panel.elements {
os_signpost(type: .begin, log: refreshLog, name: " ")
fetchAsset(for: element)
os_signpost(type: .end, log: refreshLog, name: " ")
}
os_signpost(type: .end, log: refreshLog, name: " ") //
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ඇಉظॲཧʹ͍ͨ͠
!
͕ಉ࣌ʹΔ͜ͱ͋Δ…
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os_signpost(type: .begin, log: refreshLog, name: " ")
for element in panel.elements {
os_signpost(type: .begin, log: refreshLog, name: " ")
fetchAssetAsync(for: element) {
os_signpost(type: .end, log: refreshLog, name: " ")
}
}
notifyWhenDone {
os_signpost(type: .end, log: refreshLog, name: " ")
}
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let
!♻
= OSSignpostID(log: refreshLog) //
os_signpost(type: .begin, log: refreshLog, name: " ")
for element in panel.elements {
let
!$
= OSSignpostID(log: refreshLog, object: element) //
os_signpost(type: .begin, log: refreshLog, name: " ")
fetchAssetAsync(for: element) {
os_signpost(type: .end, log: refreshLog, name: " ")
}
}
notifyWhenDone {
os_signpost(type: .end, log: refreshLog, name: " ")
}
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let
!♻
= OSSignpostID(log: refreshLog)
os_signpost(type: .begin, log: refreshLog, name: " ",
signpostID:
!♻
) //
#
for element in panel.elements {
let
!$
= OSSignpostID(log: refreshLog, object: element)
os_signpost(type: .begin, log: refreshLog, name: " ",
signpostID:
!$
) //
#
fetchAssetAsync(for: element) {
os_signpost(type: .end, log: refreshLog, name: " ",
signpostID:
!$
) //
#
}
}
notifyWhenDone {
os_signpost(type: .end, log: refreshLog, name: " ",
signpostID:
!♻
) //
#
}
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Example Represents
Log category "RefreshOperatio
ns"
ؔ࿈͢Δॲཧͷ
·ͱ·Γ
Signpost name "!" ܭଌର
Signpost ID "! ܭଌ͢Δॲཧ
ͻͱͭͻͱͭ
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ϝλσʔλΛ
ೖΕ͍ͨ
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os_signpost(
type: .begin, log: log, name: "Compute Physics",
"for %{public}@ at (%.1f, %.1f)"
+ "with mass %.2f and velocity (%.1f, %.1f)",
description, x1, y1, m, x2, y2
)
• %.1f , %.2f , %d ...
• %{public}@
• %{xcode:size-in-bytes}llu
• Instrumentsʹੳσʔλͱͯ͠ೝࣝͤ͞Δ
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୯ൃΠϕϯτΛ
ه͍ͨ͠
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os_signpost(
.event, log: log, name: "Swipe",
"For action 0x%x", actionCode
)
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ϩάΛoffʹ͍ͨ͠
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let refreshLog: OSLog
if ProcessInfo.processInfo.environment.keys.contains("SIGNPOSTS_FOR_REFRESH") {
refreshLog = OSLog(
subsystem: "com.example.your-app",
category: "RefreshOperations"
)
} else {
refreshLog = .disabled
}
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ϩάͷͨΊʹίετͷ͔͔ΔॲཧΛ͍ͯ͠Δ߹…
if refreshLog.signpostsEnabled {
let information = copyDescription()
os_signpost(..., information)
}
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Instruments
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• Instruments → Blank → [+] → "os_signpost" ͰϑΟϧλ
• signposts͕֬ೝͰ͖Δʢ˞࣮ػͰಈ͔͢͜ͱʣ
• Time Profiler
• ͰΠϕϯτΛ֬ೝͰ͖ΔOSLog͋Δ
• OSLog(subsystem: ..., category: .pointsOfInterest) ʹ
.event ΛૹΔ
• Custom Instruments
• ϏδϡΞϥΠζͷํ๏ΛΧελϚΠζͰ͖Δ
• ʮnඵҎ্͔͔͍ͬͯΔॲཧΛ͘දࣔ͢Δʯͱ͔
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·ͱΊ
signpostsͰίʔυΛΞϊςʔτ͠Α͏
• ؆୯ʹॲཧͷϧʔϓΛϩάͰ͖Δ
• ϝλσʔλؚΊΒΕΔ
InstrumentsͰ֬ೝ͠Α͏
• ॲཧ࣌ؒΛϏδϡΞϥΠζͰ͖Δ
• ϓϩάϥϜ͕ԿΛ͍ͯ͠Δ͔Θ͔Δ
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Refer to
Measuring Performance Using Logging
https://developer.apple.com/videos/play/
wwdc2018/405/
• ͜ͷࢿྉʢ΄΅ʣηογϣϯͷҾ͖ࣸ͠Ͱ͢
• InstrumentsͷσϞTipsॆ࣮ͯͯ͠ඞݟ
• ͱ͍͏Θ͚ͰݩηογϣϯΛݟ·͠ΐ͏
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