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Because string contents could be split in two separate chunks, the default ProfilerStringView deserializer needed to concatenate it together in an off-chunk buffer. But now thanks to ProfileBufferEntryReader::ReadSpans, it is possible to know if the contents are in a single memory area inside one chunk (which should be the vast majority of cases), in which case the ProfilerStringView can just reference it using its internal std::string_view, which saves managing a separate buffer and copying data into it. However this can only be done safely when the span is correctly aligned for the character type, which may not be the case for char16_t strings that must be even-aligned. Differential Revision: https://phabricator.services.mozilla.com/D124430 |
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| moz.build | ||
| mozglue.rc | ||