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faster async/await + readablestream optimizations

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This commit is contained in:
Jarred Sumner
2022-05-27 02:51:38 -07:00
parent 17cdc0fee6
commit 3083718e3f
39 changed files with 697 additions and 256 deletions
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65
src/string_immutable.zig
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@@ -1036,6 +1036,56 @@ pub fn allocateLatin1IntoUTF8(allocator: std.mem.Allocator, comptime Type: type,
return list.toOwnedSlice();
}
pub fn allocateLatin1IntoUTF8ForArrayBuffer(allocator: std.mem.Allocator, globalThis: *JSC.JSGlobalObject, comptime Type: type, latin1_: Type) !JSC.JSValue {
if (comptime bun.FeatureFlags.latin1_is_now_ascii) {
var out = try allocator.alloc(u8, latin1_.len);
@memcpy(out.ptr, latin1_.ptr, latin1_.len);
return out;
}
var latin1 = latin1_;
if (firstNonASCII(latin1)) |start_i| {
var list = try std.ArrayList(u8).initCapacity(allocator, latin1_.len + 2);
list.items.len = start_i;
@memcpy(list.items.ptr, latin1.ptr, start_i);
{
var buf = list.items.ptr[list.items.len .. list.items.len + 2][0..2];
list.items.len += 2;
buf[0..2].* = latin1ToCodepointBytesAssumeNotASCII(latin1[0]);
latin1 = latin1[1..];
}
while (latin1.len > 0) {
const read = @as(usize, firstNonASCII(latin1) orelse @intCast(u32, latin1.len));
try list.ensureTotalCapacityPrecise(
list.items.len + read + if (read != latin1.len) @as(usize, 2) else @as(usize, 0),
);
const before = list.items.len;
list.items.len += read;
@memcpy(list.items[before..].ptr, latin1.ptr, read);
latin1 = latin1[read..];
if (latin1.len > 0) {
try list.ensureUnusedCapacity(2);
var buf = list.items.ptr[list.items.len .. list.items.len + 2][0..2];
list.items.len += 2;
buf[0..2].* = latin1ToCodepointBytesAssumeNotASCII(latin1[0]);
latin1 = latin1[1..];
}
}
return JSC.ArrayBuffer.fromBytes(list.toOwnedSlice(), .Uint8Array).toJS(globalThis, null);
}
{
const array_buffer = JSC.JSValue.createUninitializedUint8Array(globalThis, latin1.len);
var bytes = array_buffer.asArrayBuffer(globalThis).?.slice();
@memcpy(bytes.ptr, latin1.ptr, latin1.len);
return array_buffer;
}
}
pub const UTF16Replacement = struct {
code_point: u32 = unicode_replacement,
len: u3 = 0,
@@ -1144,6 +1194,7 @@ pub fn copyLatin1IntoUTF8(buf_: []u8, comptime Type: type, latin1_: Type) Encode
@memcpy(buf_.ptr, latin1_.ptr, to_copy);
return .{ .written = to_copy, .read = to_copy };
}
var buf = buf_;
var latin1 = latin1_;
while (buf.len > 0 and latin1.len > 0) {
@@ -1164,11 +1215,11 @@ pub fn copyLatin1IntoUTF8(buf_: []u8, comptime Type: type, latin1_: Type) Encode
while (read < latin1.len and latin1[read] < 0x80) : (read += 1) {}
const written = @minimum(read, buf.len);
if (written == 0) break;
@memcpy(buf.ptr, latin1.ptr, written);
latin1 = latin1[written..];
buf = buf[written..];
const to_copy = @minimum(read, buf.len);
@memcpy(buf.ptr, latin1.ptr, to_copy);
latin1 = latin1[to_copy..];
buf = buf[to_copy..];
if (latin1.len > 0 and buf.len >= 2) {
buf[0..2].* = latin1ToCodepointBytesAssumeNotASCII(latin1[0]);
latin1 = latin1[1..];
@@ -1177,8 +1228,8 @@ pub fn copyLatin1IntoUTF8(buf_: []u8, comptime Type: type, latin1_: Type) Encode
}
return .{
.read = @truncate(u32, buf_.len - buf.len),
.written = @truncate(u32, latin1_.len - latin1.len),
.written = @truncate(u32, buf_.len - buf.len),
.read = @truncate(u32, latin1_.len - latin1.len),
};
}