spring-framework

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Author	SHA1	Message	Date
Brian Clozel	567265123b	Avoid using regex matching for static patterns Prior to this commit (and the previous one), the `AntPathStringMatcher` (inner class of `AntPathmatcher`) would compile `Pattern` instances and use regex matching even for static patterns such as `"/home"`. This change introduces a shortcut in the string matcher algorithm to skip the `Pattern` creation and uses `String` equality instead. Static patterns are quite common in applications and this change can bring performance improvements, depending on the mix of patterns configured in the web application. In benchmarks (added with this commit), we're seeing +20% throughput and -40% allocation. This of course can vary depending on the number of static patterns configured in the application. Closes gh-24887	6 years ago
Brian Clozel	612a63c0f1	Optimize MediaType parsing Prior to this commit, `MediaType.parseMediaType` would already rely on the internal LRU cache in `MimeTypeUtils` for better performance. With that optimization, the parsing of raw media types is skipped for cached elements. But still, `MediaType.parseMediaType` would first get a cached `MimeType` instance from that cache and then instantiate a `new MediaType(type, subtype, parameters)`. This constructor not only replays the `MimeType` checks on type/subtyme tokens and parameters, but it also performs `MediaType`-specific checks on parameters. Such checks are not required, as we're using an existing `MimeType` instance in the first place. This commit adds a new protected copy constructor (skipping checks) in `MimeType` and uses it in `MediaType.parseMediaType` as a result. This yields interesting performance improvements, with +400% throughput and -40% allocation/call in benchmarks. This commit also introduces a new JMH benchmark for future optimization work. Closes gh-24769	6 years ago

Author

SHA1

Message

Date

Brian Clozel

567265123b

Avoid using regex matching for static patterns

Prior to this commit (and the previous one), the `AntPathStringMatcher`
(inner class of `AntPathmatcher`) would compile `Pattern` instances and
use regex matching even for static patterns such as `"/home"`.

This change introduces a shortcut in the string matcher algorithm to
skip the `Pattern` creation and uses `String` equality instead.
Static patterns are quite common in applications and this change can
bring performance improvements, depending on the mix of patterns
configured in the web application.

In benchmarks (added with this commit), we're seeing +20% throughput
and -40% allocation. This of course can vary depending on the number of
static patterns configured in the application.

Closes gh-24887

6 years ago

Brian Clozel

612a63c0f1

Optimize MediaType parsing

Prior to this commit, `MediaType.parseMediaType` would already rely on
the internal LRU cache in `MimeTypeUtils` for better performance. With
that optimization, the parsing of raw media types is skipped for cached
elements.
But still, `MediaType.parseMediaType` would first get a cached
`MimeType` instance from that cache and then instantiate a
`new MediaType(type, subtype, parameters)`. This constructor not only
replays the `MimeType` checks on type/subtyme tokens and parameters, but
it also performs `MediaType`-specific checks on parameters.
Such checks are not required, as we're using an existing `MimeType`
instance in the first place.

This commit adds a new protected copy constructor (skipping checks) in
`MimeType` and uses it in `MediaType.parseMediaType` as a result.

This yields interesting performance improvements, with +400% throughput
and -40% allocation/call in benchmarks. This commit also introduces a
new JMH benchmark for future optimization work.

Closes gh-24769

6 years ago

2 Commits (198d64d5396346d1ce33ca9a80df34fafb2c851f)