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Start with 16K buffer (down from 32K). Use array list growth algorithm

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This commit is contained in:
Karl Seguin
2025-08-29 10:33:27 +08:00
parent 74d90f2892
commit efc983b009
1 changed files with 21 additions and 7 deletions
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28
src/server.zig
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@@ -547,7 +547,7 @@ fn Reader(comptime EXPECT_MASK: bool) type {
const Self = @This();
fn init(allocator: Allocator) !Self {
const buf = try allocator.alloc(u8, 32 * 1024);
const buf = try allocator.alloc(u8, 16 * 1024);
return .{
.buf = buf,
.allocator = allocator,
@@ -626,12 +626,9 @@ fn Reader(comptime EXPECT_MASK: bool) type {
} else if (message_len > MAX_MESSAGE_SIZE) {
return error.TooLarge;
} else if (message_len > self.buf.len) {
const new_buf = try self.allocator.alloc(u8, message_len);
@memcpy(new_buf[0..buf.len], buf);
self.allocator.free(self.buf);
self.buf = new_buf;
self.len = buf.len;
buf = new_buf[0..buf.len];
const len = self.buf.len;
self.buf = try growBuffer(self.allocator, self.buf, message_len);
buf = self.buf[0..len];
// we need more data
return null;
} else if (buf.len < message_len) {
@@ -780,6 +777,23 @@ fn Reader(comptime EXPECT_MASK: bool) type {
};
}
fn growBuffer(allocator: Allocator, buf: []u8, required_capacity: usize) ![]u8 {
// from std.ArrayList
var new_capacity = buf.len;
while (true) {
new_capacity +|= new_capacity / 2 + 8;
if (new_capacity >= required_capacity) break;
}
if (allocator.resize(buf, new_capacity)) {
return buf.ptr[0..new_capacity];
}
const new_buffer = try allocator.alloc(u8, new_capacity);
@memcpy(new_buffer[0..buf.len], buf);
allocator.free(buf);
return new_buffer;
}
const Fragments = struct {
type: Message.Type,
message: std.ArrayListUnmanaged(u8),