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[wasm] Introduce <InvariantTimezone> build flag #87284

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merged 10 commits into from
Jul 1, 2023
Merged

[wasm] Introduce <InvariantTimezone> build flag #87284

merged 10 commits into from
Jul 1, 2023

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pavelsavara
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@pavelsavara pavelsavara commented Jun 8, 2023 •
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In Net8 we bundle the timezone database into .wasm file by default. It's not separate download anymore.

To to make download size of browser/wasi application smaller, we could link it out.
The runtime would behave as if there was no timezones in the database and use UTC.
For WASI, it doesn't try to load it from host FS unless you also set TZDIR env variable.

In the project file

<InvariantTimezone>true</InvariantTimezone>

Requires re-linking with wasm workload.

Also backward compatible with BlazorEnableTimeZoneSupport but with workload.

Fixes #37973 for wasm

@pavelsavara pavelsavara added arch-wasm WebAssembly architecture area-Build-mono size-reduction Issues impacting final app size primary for size sensitive workloads labels Jun 8, 2023
@pavelsavara pavelsavara added this to the 8.0.0 milestone Jun 8, 2023
@pavelsavara pavelsavara self-assigned this Jun 8, 2023
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ghost commented Jun 8, 2023

Tagging subscribers to 'arch-wasm': @lewing
See info in area-owners.md if you want to be subscribed.

Issue Details

In Net8 we bundle the timezone database into .wasm file by default. It's not separate download anymore.

To to make download size of wasm/wasi application smaller, we could link it out.
The runtime would behave as if there was no timezones in the database and use UTC.
For WASI, it not try to load it from host FS unless you also set TZDIR env variable.

In the project file

<InvariantTimezone>true</InvariantTimezone>

Requires re-linking with wasm workload.

Also backward compatible with BlazorEnableTimeZoneSupport but with workload.

Fixes #37973 for wasm

Author: pavelsavara
Assignees: pavelsavara
Labels:

arch-wasm, area-Build-mono, size-reduction
Milestone: 8.0.0

@maraf
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maraf commented Jun 8, 2023

Is it the right time to have two WASM flavors/files in the runtime pack and choose between them during client app build?

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I don't have bandwidth to implement it.

@pavelsavara pavelsavara mentioned this pull request Jun 12, 2023
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@maraf maraf mentioned this pull request Jun 21, 2023
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/azp run runtime-wasm

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Azure Pipelines successfully started running 1 pipeline(s).

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/azp run runtime-wasm

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Azure Pipelines successfully started running 1 pipeline(s).

@build-analysis build-analysis bot mentioned this pull request Jun 26, 2023
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@pavelsavara
Merge branch 'main' into wasm_invariant_timezone
37b89ac
@pavelsavara
WBT
75a14d1
@pavelsavara
Merge branch 'main' into wasm_invariant_timezone
d6aa491 
# Conflicts:
#	src/mono/sample/wasm/browser-advanced/Wasm.Advanced.Sample.csproj
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image

@pavelsavara pavelsavara marked this pull request as ready for review June 28, 2023 07:04
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/azp run runtime-wasm-optional

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Azure Pipelines successfully started running 1 pipeline(s).

maraf
maraf approved these changes Jun 28, 2023
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Looks good to me 👍

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kg commented Jun 28, 2023

How big is the size savings from this? Just curious

kg
kg reviewed Jun 28, 2023
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docs/design/features/timezone-invariant-mode.md Outdated

Author: [Pavel Savara](https://github.com/pavelsavara)

It's currently only available for Browser OS
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Maybe specifically call out that it strips the tz data from the binary

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How big is the size savings from this? Just curious

over 200KB

@pavelsavara
Merge branch 'main' into wasm_invariant_timezone
28bdd49 
# Conflicts:
#	src/mono/wasm/build/WasmApp.targets
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30fc179
@pavelsavara pavelsavara merged commit d388585 into dotnet:main Jul 1, 2023
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@ghost ghost locked as resolved and limited conversation to collaborators Jul 31, 2023
@pavelsavara pavelsavara deleted the wasm_invariant_timezone branch September 2, 2024 15:31
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@radical radical radical left review comments

@mdh1418 mdh1418 mdh1418 left review comments

@kg kg kg approved these changes

@maraf maraf maraf approved these changes

@ilonatommy ilonatommy ilonatommy approved these changes

@lewing lewing Awaiting requested review from lewing lewing is a code owner

@marek-safar marek-safar Awaiting requested review from marek-safar

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@pavelsavara pavelsavara

Labels
arch-wasm WebAssembly architecture area-Build-mono size-reduction Issues impacting final app size primary for size sensitive workloads
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Add feature-switch for invariant TimeZone support
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@pavelsavara @maraf @kg @radical @mdh1418 @ilonatommy