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Expose Regex memory usage info (fixes #943) #1377

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Expose Regex memory usage info (fixes #943) #1377

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46aa356
Expose Regex memory usage info (fixes #943)
mispecto Apr 5, 2024
f4ef0f5
Update src/regex/bytes.rs
BurntSushi Jul 24, 2026
ed7eb5c
Update src/regex/string.rs
BurntSushi Jul 24, 2026
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9 changes: 9 additions & 0 deletions src/regex/bytes.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1482,6 +1482,15 @@ impl Regex {
pub fn locations(&self) -> CaptureLocations {
self.capture_locations()
}

/// Return the total approximate heap memory, in bytes, used by this `Regex`.
///
/// Note that this value does not have a defined relationship to
/// to [`RegexBuilder::size_limit`].
#[inline]
pub fn memory_usage(&self) -> usize {
self.meta.memory_usage() + self.pattern.len()
}
}

/// Represents a single match of a regex in a haystack.
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9 changes: 9 additions & 0 deletions src/regex/string.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1481,6 +1481,15 @@ impl Regex {
pub fn locations(&self) -> CaptureLocations {
self.capture_locations()
}

/// Return the total approximate heap memory, in bytes, used by this `Regex`.
///
/// Note that this value does not have a defined relationship to
/// to [`RegexBuilder::size_limit`].
#[inline]
pub fn memory_usage(&self) -> usize {
self.meta.memory_usage() + self.pattern.len()
}
}

/// Represents a single match of a regex in a haystack.
Expand Down