[Xamarin.Android.Build.Tasks] ResolveLibraryProjectImports temp files #2540
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dellis1972
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Dec 17, 2018
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Not going to merge since we do not have any build system atm :/ |
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When reviewing `ResolveLibraryProjectImports`, I noticed a few things
we could improve:
1. We are using `GetResourceData` to get the entire contents of a file
as a `byte[]` and then writing to disk.
2. We are writing temporary zip files to disk, reading them to extract,
then deleting them.
The first thing I did was take advantage of the `GetResourceStream`
method, so we could just do `stream.CopyTo(file)`. This prevents us
from allocating big `byte[]` the size of each file.
Next, I took advantage of `ZipArchive.Open (stream)` and
`GetResourceStream` to avoid the need for creating temporary zip
files. We can unzip directly from the `Stream` in memory.
~~ Results ~~
When timing these changes, I used the Xamarin.Forms integration
project in this repo:
Before
1. 1793 ms ResolveLibraryProjectImports 1 calls
2. 1780 ms ResolveLibraryProjectImports 1 calls
3. 1770 ms ResolveLibraryProjectImports 1 calls
After
1. 1750 ms ResolveLibraryProjectImports 1 calls
2. 1740 ms ResolveLibraryProjectImports 1 calls
3. 1702 ms ResolveLibraryProjectImports 1 calls
I would say the improvements here are around 50ms.
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…#2540) When reviewing the `<ResolveLibraryProjectImports/>` task, I noticed a few things we could improve: 1. We are using `GetResourceData()` to get the entire contents of a file as a `byte[]` and then writing to disk. 2. We are writing temporary zip files to disk, reading them to extract, then deleting them. The first thing I did was take advantage of the `GetResourceStream()` method, so we could just do `stream.CopyTo(file)`. This prevents us from allocating big `byte[]` the size of each file. Next, I took advantage of `ZipArchive.Open(stream)` and `GetResourceStream()` to avoid the need for creating temporary zip files. We can unzip directly from the `Stream` in memory. ~~ Results ~~ When timing these changes, I used the Xamarin.Forms integration project in this repo: Before 1. 1793 ms ResolveLibraryProjectImports 1 calls 2. 1780 ms ResolveLibraryProjectImports 1 calls 3. 1770 ms ResolveLibraryProjectImports 1 calls After 1. 1750 ms ResolveLibraryProjectImports 1 calls 2. 1740 ms ResolveLibraryProjectImports 1 calls 3. 1702 ms ResolveLibraryProjectImports 1 calls I would say the improvements here are around 50ms.
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When reviewing
ResolveLibraryProjectImports, I noticed a few thingswe could improve:
GetResourceDatato get the entire contents of a fileas a
byte[]and then writing to disk.then deleting them.
The first thing I did was take advantage of the
GetResourceStreammethod, so we could just do
stream.CopyTo(file). This prevents usfrom allocating big
byte[]the size of each file.Next, I took advantage of
ZipArchive.Open (stream)andGetResourceStreamto avoid the need for creating temporary zipfiles. We can unzip directly from the
Streamin memory.Results
When timing these changes, I used the Xamarin.Forms integration
project in this repo:
I would say the improvements here are around 50ms.