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constellation: Use FnvHashMap for hashmaps that use ids as keys (#39106)

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FNV is faster for hashing less than 16 bytes of data and the
cryptographic properties of the default HashMap are not needed for the
various ids.

Testing: This does not change functionality.

Signed-off-by: Narfinger <Narfinger@users.noreply.github.com>
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Narfinger 2025-09-03 20:15:19 +02:00 • committed by GitHub
parent 0ae9ee28d5
commit 5c7ea4bdee
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19 changed files with 71 additions and 54 deletions
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4
components/shared/constellation/from_script_message.rs
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@ -4,7 +4,6 @@
//! Messages send from the ScriptThread to the Constellation.
use std::collections::HashMap;
use std::fmt;
use base::Epoch;
@ -22,6 +21,7 @@ use embedder_traits::{
ViewportDetails, WebDriverMessageId,
};
use euclid::default::Size2D as UntypedSize2D;
use fnv::FnvHashMap;
use fonts_traits::SystemFontServiceProxySender;
use http::{HeaderMap, Method};
use ipc_channel::ipc::IpcSender;
@ -492,7 +492,7 @@ pub enum ScriptToConstellationMessage {
/* The ids of ports transferred successfully */
Vec<MessagePortId>,
/* The ids, and buffers, of ports whose transfer failed */
HashMap<MessagePortId, PortTransferInfo>,
FnvHashMap<MessagePortId, PortTransferInfo>,
),
/// A new message-port was created or transferred, with corresponding control-sender.
NewMessagePort(MessagePortRouterId, MessagePortId),