This issue is now fixed. Please see how to use it on https://flutter.dev/docs/perf/rendering/shader.

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This tracks our short-term solution of #32170 that's based on SkSL (Skia shader language).

• Automatic shader-compile jank removal using SkSL precompile for customer: dream Automatic shader-compile jank removal using SkSL precompile for customer: dream #40686
• Create service protocols to read back generated SkSLs Create service protocols to read back generated SkSLs #53114
• Connect flutter tools to VM service callback to pull sksl files from device Connect flutter tools to VM service callback to pull sksl files from device #53116
• Add support for --sksl-shader-warmup to package sksl files into flutter_assets Add support for --sksl-shader-warmup to package sksl files into flutter_assets #53115
• Allow reading SkSLs artifacts from a special asset subdirectory Allow reading SkSLs artifacts from a special asset subdirectory #53117
• Update SkSL bundle format Update SkSL bundle format #55219
• Automatically write SkSLs with --cache-sksl flag Automatically write SkSLs with --cache-sksl flag #54484
• Document how to use SkSL-based shader warmup Document how to use SkSL-based shader warmup #60313

Everything above would allow developers to use SkSL shader warm-up from command lines. We will also add support for IDE plugins #54287 in the future.